Puestos de Trabajo registrados en el IMSS1 2 Entidad Federativa:  Nacional--------------------------------------------AguascalientesBaja CaliforniaBaja California SurCampecheCoahuilaColimaChiapasChihuahuaDistrito FederalDurangoGuanajuatoGuerreroHidalgoJaliscoMexicoMichoacanMorelosNayaritNuevo LeonOaxacaPueblaQueretaroQuintana RooSan Luis PotosiSinaloaSonoraTabascoTamaulipasTlaxcalaVeracruzYucatanZacatecas Periodo Total  Trabajadores Permanentes Trabajadores Eventuales Subtotal  Urbanos Del Campo 1997 1997/Jul 10,227,752 9,800,705 427,047 426,090 957 1997/Aug 10,291,473 9,753,974 537,499 536,341 1,158 1997/Sep 10,460,841 9,819,341 641,500 640,102 1,398 1997/Oct 10,607,271 9,867,536 739,735 738,103 1,632 1997/Nov 10,682,883 9,886,260 796,623 788,098 8,525 1997/Dec 10,536,717 9,751,092 785,625 769,304 16,321 Promedio 10,467,823 9,813,151 654,672 649,673 4,998 1998 1998/Jan 10,650,123 9,777,860 872,263 842,923 29,340 1998/Feb 10,749,014 9,826,971 922,043 883,967 38,076 1998/Mar 10,885,713 9,900,111 985,602 930,113 55,489 1998/Apr 10,971,363 9,933,563 1,037,800 956,599 81,201 1998/May 10,955,167 9,923,491 1,031,676 958,119 73,557 1998/Jun 11,028,169 9,979,882 1,048,287 990,415 57,872 1998/Jul 11,120,557 10,033,653 1,086,904 1,039,556 47,348 1998/Aug 11,186,179 10,077,906 1,108,273 1,067,210 41,063 1998/Sep 11,283,472 10,153,574 1,129,898 1,088,452 41,446 1998/Oct 11,376,307 10,222,955 1,153,352 1,111,280 42,072 1998/Nov 11,422,969 10,274,745 1,148,224 1,097,481 50,743 1998/Dec 11,243,230 10,167,228 1,076,002 1,004,663 71,339 Promedio 11,072,689 10,022,662 1,050,027 997,565 52,462 1999 1999/Jan 11,298,350 10,184,564 1,113,786 1,024,035 89,751 1999/Feb 11,427,884 10,251,857 1,176,027 1,057,776 118,251 1999/Mar 11,529,657 10,327,121 1,202,536 1,082,953 119,583 1999/Apr 11,595,331 10,375,145 1,220,186 1,108,438 111,748 1999/May 11,616,028 10,421,378 1,194,650 1,109,240 85,410 1999/Jun 11,650,220 10,470,224 1,179,996 1,132,809 47,187 1999/Jul 11,699,653 10,495,245 1,204,408 1,165,760 38,648 1999/Aug 11,795,913 10,565,752 1,230,161 1,190,517 39,644 1999/Sep 11,918,475 10,665,800 1,252,675 1,210,991 41,684 1999/Oct 11,992,623 10,738,688 1,253,935 1,216,183 37,752 1999/Nov 12,148,037 10,850,963 1,297,074 1,249,164 47,910 1999/Dec 11,905,112 10,703,272 1,201,840 1,137,965 63,875 Promedio 11,714,774 10,504,167 1,210,606 1,140,486 70,120 2000 2000/Jan 12,034,095 10,772,480 1,261,615 1,174,893 86,722 2000/Feb 12,158,433 10,847,478 1,310,955 1,205,433 105,522 2000/Mar 12,258,841 10,927,028 1,331,813 1,230,773 101,040 2000/Apr 12,254,009 10,933,275 1,320,734 1,221,442 99,292 2000/May 12,345,063 11,014,909 1,330,154 1,259,993 70,161 2000/Jun 12,405,558 11,080,108 1,325,450 1,284,210 41,240 2000/Jul 12,494,633 11,138,822 1,355,811 1,323,210 32,601 2000/Aug 12,554,723 11,240,971 1,313,752 1,283,613 30,139 2000/Sep 12,605,656 11,305,454 1,300,202 1,270,643 29,559 2000/Oct 12,724,493 11,408,390 1,316,103 1,284,010 32,093 2000/Nov 12,777,514 11,460,594 1,316,920 1,276,909 40,011 2000/Dec 12,437,760 11,247,407 1,190,353 1,139,376 50,977 Promedio 12,420,898 11,114,743 1,306,155 1,246,209 59,946 2001 2001/Jan 12,525,949 11,272,010 1,253,939 1,171,143 82,796 2001/Feb 12,559,358 11,303,474 1,255,884 1,155,529 100,355 2001/Mar 12,530,250 11,282,754 1,247,496 1,148,375 99,121 2001/Apr 12,534,173 11,296,770 1,237,403 1,138,588 98,815 2001/May 12,505,105 11,273,321 1,231,784 1,151,792 79,992 2001/Jun 12,418,906 11,225,254 1,193,652 1,152,451 41,201 2001/Jul 12,416,576 11,214,260 1,202,316 1,174,666 27,650 2001/Aug 12,406,096 11,191,144 1,214,952 1,184,817 30,135 2001/Sep 12,358,665 11,160,802 1,197,863 1,167,527 30,336 2001/Oct 12,423,519 11,197,190 1,226,329 1,192,671 33,658 2001/Nov 12,451,466 11,215,560 1,235,906 1,190,031 45,875 2001/Dec 12,170,945 11,050,422 1,120,523 1,060,581 59,942 Promedio 12,441,751 11,223,580 1,218,171 1,157,348 60,823 2002 2002/Jan 12,195,513 11,024,525 1,170,988 1,088,487 82,501 2002/Feb 12,275,211 11,049,740 1,225,471 1,128,090 97,381 2002/Mar 12,221,087 11,045,981 1,175,106 1,085,997 89,109 2002/Apr 12,352,690 11,111,839 1,240,851 1,153,858 86,993 2002/May 12,338,063 11,141,182 1,196,881 1,151,209 45,672 2002/Jun 12,288,156 11,107,096 1,181,060 1,152,183 28,877 2002/Jul 12,368,684 11,163,149 1,205,535 1,183,897 21,638 2002/Aug 12,340,462 11,126,661 1,213,801 1,191,965 21,836 2002/Sep 12,400,521 11,199,494 1,201,027 1,179,266 21,761 2002/Oct 12,457,620 11,221,072 1,236,548 1,211,729 24,819 2002/Nov 12,472,617 11,246,286 1,226,331 1,198,338 27,993 2002/Dec 12,232,301 11,083,044 1,149,257 1,100,740 48,517 Promedio 12,328,577 11,126,672 1,201,905 1,152,147 49,758 2003 2003/Jan 12,269,469 11,081,499 1,187,970 1,118,460 69,510 2003/Feb 12,321,596 11,091,738 1,229,858 1,151,218 78,640 2003/Mar 12,348,257 11,125,523 1,222,734 1,145,312 77,422 2003/Apr 12,337,553 11,108,266 1,229,287 1,165,857 63,430 2003/May 12,269,056 11,092,515 1,176,541 1,144,770 31,771 2003/Jun 12,270,626 11,069,744 1,200,882 1,177,542 23,340 2003/Jul 12,270,143 11,062,169 1,207,974 1,183,625 24,349 2003/Aug 12,229,764 11,023,996 1,205,768 1,183,304 22,464 2003/Sep 12,323,341 11,106,946 1,216,395 1,192,961 23,434 2003/Oct 12,427,371 11,161,653 1,265,718 1,242,208 23,510 2003/Nov 12,462,714 11,215,664 1,247,050 1,214,023 33,027 2003/Dec 12,257,581 11,078,954 1,178,627 1,123,758 54,869 Promedio 12,315,623 11,101,556 1,214,067 1,170,253 43,814 2004 2004/Jan 12,294,000 11,081,309 1,212,691 1,145,573 67,118 2004/Feb 12,351,665 11,102,759 1,248,906 1,175,976 72,930 2004/Mar 12,478,529 11,198,847 1,279,682 1,203,709 75,973 2004/Apr 12,505,272 11,213,072 1,292,200 1,225,851 66,349 2004/May 12,495,167 11,255,593 1,239,574 1,203,584 35,990 2004/Jun 12,515,338 11,261,608 1,253,730 1,233,578 20,152 2004/Jul 12,550,854 11,282,669 1,268,185 1,232,169 36,016 2004/Aug 12,597,254 11,302,569 1,294,685 1,255,134 39,551 2004/Sep 12,683,727 11,371,116 1,312,611 1,270,930 41,681 2004/Oct 12,737,398 11,403,526 1,333,872 1,293,992 39,880 2004/Nov 12,871,388 11,508,415 1,362,973 1,299,779 63,194 2004/Dec 12,632,877 11,351,533 1,281,344 1,195,894 85,450 Promedio 12,559,456 11,277,751 1,281,704 1,228,014 53,690 2005 2005/Jan 12,697,125 11,383,276 1,313,849 1,213,919 99,930 2005/Feb 12,788,890 11,425,741 1,363,149 1,257,627 105,522 2005/Mar 12,799,019 11,462,385 1,336,634 1,236,432 100,202 2005/Apr 12,852,756 11,486,497 1,366,259 1,275,470 90,789 2005/May 12,884,166 11,546,499 1,337,667 1,269,391 68,276 2005/Jun 12,911,021 11,565,924 1,345,097 1,299,660 45,437 2005/Jul 12,904,401 11,572,691 1,331,710 1,287,029 44,681 2005/Aug 13,014,610 11,623,923 1,390,687 1,338,763 51,924 2005/Sep 13,114,254 11,704,822 1,409,432 1,352,688 56,744 2005/Oct 13,234,501 11,776,414 1,458,087 1,401,872 56,215 2005/Nov 13,327,162 11,853,512 1,473,650 1,405,596 68,054 2005/Dec 13,061,565 11,684,599 1,376,966 1,286,702 90,264 Promedio 12,965,789 11,590,524 1,375,266 1,302,096 73,170 2006 2006/Jan 13,174,495 11,739,082 1,435,413 1,322,292 113,121 2006/Feb 13,285,285 11,791,681 1,493,604 1,368,941 124,663 2006/Mar 13,392,387 11,885,696 1,506,691 1,388,678 118,013 2006/Apr 13,402,509 11,894,950 1,507,559 1,400,334 107,225 2006/May 13,486,515 11,981,859 1,504,656 1,423,301 81,355 2006/Jun 13,550,640 12,026,685 1,523,955 1,465,762 58,193 2006/Jul 13,604,538 12,074,013 1,530,525 1,471,812 58,713 2006/Aug 13,676,931 12,102,989 1,573,942 1,508,058 65,884 2006/Sep 13,756,687 12,182,509 1,574,178 1,509,423 64,755 2006/Oct 13,894,328 12,259,753 1,634,575 1,557,159 77,416 2006/Nov 13,981,314 12,347,123 1,634,191 1,549,515 84,676 2006/Dec 13,678,492 12,162,964 1,515,528 1,411,737 103,791 Promedio 13,573,677 12,037,442 1,536,235 1,448,084 88,150 2007 2007/Jan 13,794,601 12,233,127 1,561,474 1,441,227 120,247 2007/Feb 13,908,701 12,294,330 1,614,371 1,486,765 127,606 2007/Mar 13,973,905 12,358,583 1,615,322 1,489,501 125,821 2007/Apr 14,043,649 12,400,871 1,642,778 1,515,501 127,277 2007/May 14,072,151 12,459,319 1,612,832 1,511,105 101,727 2007/Jun 14,089,092 12,473,167 1,615,925 1,543,939 71,986 2007/Jul 14,156,216 12,538,389 1,617,827 1,546,300 71,527 2007/Aug 14,224,297 12,564,977 1,659,320 1,582,809 76,511 2007/Sep 14,283,377 12,632,944 1,650,433 1,574,735 75,698 2007/Oct 14,441,717 12,722,238 1,719,479 1,637,867 81,612 2007/Nov 14,539,497 12,819,978 1,719,519 1,629,673 89,846 2007/Dec 14,207,706 12,628,392 1,579,314 1,471,695 107,619 Promedio 14,144,576 12,510,526 1,634,050 1,535,926 98,123 2008 2008/Jan 14,315,318 12,653,122 1,662,196 1,520,269 141,927 2008/Feb 14,396,101 12,688,305 1,707,796 1,559,501 148,295 2008/Mar 14,400,376 12,722,876 1,677,500 1,530,290 147,210 2008/Apr 14,480,066 12,763,457 1,716,609 1,571,210 145,399 2008/May 14,443,848 12,782,517 1,661,331 1,555,878 105,453 2008/Jun 14,472,908 12,815,214 1,657,694 1,574,747 82,947 2008/Jul 14,483,011 12,817,409 1,665,602 1,584,467 81,135 2008/Aug 14,460,993 12,781,187 1,679,806 1,605,340 74,466 2008/Sep 14,526,347 12,816,309 1,710,038 1,624,455 85,583 2008/Oct 14,564,570 12,824,701 1,739,869 1,651,134 88,735 2008/Nov 14,505,253 12,768,716 1,736,537 1,639,208 97,329 2008/Dec 14,178,117 12,569,068 1,609,049 1,493,484 115,565 Promedio 14,435,576 12,750,240 1,685,336 1,575,832 109,504 2009 2009/Jan 14,073,102 12,425,255 1,647,847 1,509,175 138,672 2009/Feb 14,026,501 12,363,245 1,663,256 1,514,002 149,254 2009/Mar 14,039,826 12,343,243 1,696,583 1,537,634 158,949 2009/Apr 13,979,608 12,305,737 1,673,871 1,544,078 129,793 2009/May 13,868,132 12,253,881 1,614,251 1,520,637 93,614 2009/Jun 13,871,175 12,251,814 1,619,361 1,541,947 77,414 2009/Jul 13,887,498 12,245,484 1,642,014 1,562,537 79,477 2009/Aug 13,918,843 12,253,662 1,665,181 1,585,268 79,913 2009/Sep 13,992,494 12,303,132 1,689,362 1,597,419 91,943 2009/Oct 14,073,749 12,338,030 1,735,719 1,642,451 93,268 2009/Nov 14,192,197 12,407,680 1,784,517 1,678,956 105,561 2009/Dec 14,006,404 12,313,795 1,692,609 1,567,486 125,123 Promedio 13,994,127 12,317,080 1,677,048 1,566,799 110,248 2010 2010/Jan 14,076,279 12,309,464 1,766,815 1,607,343 159,472 2010/Feb 14,204,647 12,394,866 1,809,781 1,650,889 158,892 2010/Mar 14,341,056 12,474,235 1,866,821 1,696,545 170,276 2010/Apr 14,408,942 12,533,268 1,875,674 1,729,917 145,757 2010/May 14,433,952 12,581,564 1,852,388 1,744,924 107,464 2010/Jun 14,480,255 12,630,229 1,850,026 1,764,425 85,601 2010/Jul 14,518,395 12,657,641 1,860,754 1,782,710 78,044 2010/Aug 14,593,979 12,705,851 1,888,128 1,809,507 78,621 2010/Sep 14,701,487 12,774,714 1,926,773 1,828,050 98,723 2010/Oct 14,829,981 12,861,713 1,968,268 1,870,457 97,811 2010/Nov 14,965,625 12,933,623 2,032,002 1,910,121 121,881 2010/Dec 14,738,783 12,825,828 1,912,955 1,785,801 127,154 Promedio 14,524,448 12,640,250 1,884,199 1,765,057 119,141 2011 2011/Jan 14,787,440 12,816,174 1,971,266 1,811,337 159,929 2011/Feb 14,893,818 12,888,745 2,005,073 1,843,256 161,817 2011/Mar 15,003,502 12,972,562 2,030,940 1,869,788 161,152 2011/Apr 15,022,588 13,002,659 2,019,929 1,882,405 137,524 2011/May 15,050,810 13,039,373 2,011,437 1,899,337 112,100 2011/Jun 15,090,360 13,081,753 2,008,607 1,912,366 96,241 2011/Jul 15,131,332 13,098,938 2,032,394 1,938,510 93,884 2011/Aug 15,202,180 13,142,257 2,059,923 1,961,874 98,049 2011/Sep 15,315,651 13,225,433 2,090,218 1,989,778 100,440 2011/Oct 15,445,527 13,309,189 2,136,338 2,029,128 107,210 2011/Nov 15,550,167 13,375,526 2,174,641 2,051,416 123,225 2011/Dec 15,350,335 13,266,730 2,083,605 1,935,696 147,909 Promedio 15,153,642 13,101,612 2,052,031 1,927,074 124,957 2012 2012/Jan 15,427,859 13,286,683 2,141,176 1,966,577 174,599 2012/Feb 15,563,594 13,382,106 2,181,488 2,001,570 179,918 2012/Mar 15,695,679 13,465,478 2,230,201 2,039,667 190,534 2012/Apr 15,706,159 13,491,961 2,214,198 2,053,914 160,284 2012/May 15,731,556 13,547,118 2,184,438 2,067,167 117,271 2012/Jun 15,806,830 13,621,460 2,185,370 2,084,389 100,981 2012/Jul 15,849,227 13,653,535 2,195,692 2,102,666 93,026 2012/Aug 15,920,256 13,704,769 2,215,487 2,117,213 98,274 2012/Sep 16,033,095 13,794,510 2,238,585 2,136,836 101,749 2012/Oct 16,182,408 13,894,901 2,287,507 2,172,732 114,775 2012/Nov 16,294,936 13,965,120 2,329,816 2,185,415 144,401 2012/Dec 16,062,043 13,847,599 2,214,444 2,054,233 160,211 Promedio 15,856,137 13,637,937 2,218,200 2,081,865 136,335 2013 2013/Jan 16,106,212 13,859,116 2,247,096 2,078,409 168,687 2013/Feb 16,227,085 13,933,772 2,293,313 2,109,346 183,967 2013/Mar 16,281,079 13,976,498 2,304,581 2,114,357 190,224 2013/Apr 16,347,973 14,040,794 2,307,179 2,134,669 172,510 2013/May 16,354,902 14,077,270 2,277,632 2,131,969 145,663 2013/Jun 16,357,421 14,109,463 2,247,958 2,133,083 114,875 2013/Jul 16,362,732 14,121,670 2,241,062 2,142,820 98,242 2013/Aug 16,414,905 14,161,683 2,253,222 2,153,928 99,294 2013/Sep 16,508,845 14,225,223 2,283,622 2,172,004 111,618 2013/Oct 16,652,436 14,324,766 2,327,670 2,205,436 122,234 2013/Nov 16,772,971 14,396,311 2,376,660 2,231,682 144,978 2013/Dec 16,525,061 14,250,352 2,274,709 2,105,199 169,510 Promedio 16,409,302 14,123,076 2,286,225 2,142,742 143,484 2014 2014/Jan 16,547,040 14,227,698 2,319,342 2,132,081 187,261 2014/Feb 16,672,599 14,302,977 2,369,622 2,174,182 195,440 2014/Mar 16,781,325 14,374,413 2,406,912 2,202,723 204,189 2014/Apr 16,837,367 14,437,257 2,400,110 2,215,244 184,866 2014/May 16,885,220 14,504,299 2,380,921 2,223,781 157,140 2014/Jun 16,928,515 14,558,766 2,369,749 2,245,666 124,083 2014/Jul 16,965,972 14,586,247 2,379,725 2,266,898 112,827 2014/Aug 17,023,661 14,619,574 2,404,087 2,287,193 116,894 2014/Sep 17,180,093 14,707,526 2,472,567 2,337,853 134,714 2014/Oct 17,352,227 14,831,481 2,520,746 2,376,329 144,417 2014/Nov 17,475,077 14,910,604 2,564,473 2,401,576 162,897 2014/Dec 17,239,587 14,782,649 2,456,938 2,269,378 187,560 Promedio 16,990,724 14,570,291 2,420,433 2,261,075 159,357 2015 2015/Jan 17,299,371 14,794,354 2,505,017 2,302,998 202,019 2015/Feb 17,433,062 14,884,954 2,548,108 2,336,367 211,741 2015/Mar 17,538,198 14,968,530 2,569,668 2,359,551 210,117 2015/Apr 17,603,315 15,024,445 2,578,870 2,372,578 206,292 2015/May 17,595,860 15,062,413 2,533,447 2,368,960 164,487 2015/Jun 17,674,295 15,146,453 2,527,842 2,392,946 134,896 2015/Jul 17,718,986 15,187,532 2,531,454 2,403,218 128,236 2015/Aug 17,791,345 15,249,519 2,541,826 2,401,901 139,925 2015/Sep 17,908,989 15,344,056 2,564,933 2,417,222 147,711 2015/Oct 18,055,468 15,460,720 2,594,748 2,443,280 151,468 2015/Nov 18,187,747 15,547,671 2,640,076 2,458,213 181,863 2015/Dec 17,884,033 15,381,186 2,502,847 2,304,201 198,646 Promedio 17,724,222 15,170,986 2,553,236 2,380,120 173,117 2016 2016/Jan 17,953,203 15,390,602 2,562,601 2,342,118 220,483 2016/Feb 18,095,494 15,491,741 2,603,753 2,388,119 215,634 2016/Mar 18,154,906 15,533,030 2,621,876 2,394,552 227,324 2016/Apr 18,237,468 15,611,267 2,626,201 2,411,549 214,652 2016/May 18,257,802 15,666,289 2,591,513 2,415,499 176,014 2016/Jun 18,326,071 15,760,953 2,565,118 2,425,852 139,266 2016/Jul 18,348,131 15,782,822 2,565,309 2,433,142 132,167 2016/Aug 18,466,227 15,860,849 2,605,378 2,459,913 145,465 2016/Sep 18,626,402 15,985,920 2,640,482 2,485,524 154,958 2016/Oct 18,797,954 16,109,315 2,688,639 2,518,886 169,753 2016/Nov 18,935,841 16,205,667 2,730,174 2,531,469 198,705 2016/Dec 18,616,624 16,030,947 2,585,677 2,373,441 212,236 Promedio 18,401,344 15,785,784 2,615,560 2,431,672 183,888 2017 2017/Jan 18,699,916 16,046,797 2,653,119 2,423,664 229,455 2017/Feb 18,853,971 16,141,919 2,712,052 2,470,530 241,522 2017/Mar 18,994,318 16,255,010 2,739,308 2,495,905 243,403 2017/Apr 19,021,083 16,285,224 2,735,859 2,498,903 236,956 2017/May 19,047,825 16,349,612 2,698,213 2,510,383 187,830 2017/Jun 19,134,058 16,448,430 2,685,628 2,529,378 156,250 2017/Jul 19,172,222 16,474,863 2,697,359 2,548,352 149,007 2017/Aug 19,292,865 16,561,724 2,731,141 2,577,670 153,471 2017/Sep 19,428,916 16,664,966 2,763,950 2,589,310 174,640 2017/Oct 19,623,674 16,785,900 2,837,774 2,648,828 188,946 2017/Nov 19,755,991 16,872,343 2,883,648 2,669,395 214,253 2017/Dec 19,418,455 16,675,503 2,742,952 2,508,688 234,264 Promedio 19,203,608 16,463,524 2,740,084 2,539,250 200,833 2018 2018/Jan 19,532,177 16,713,722 2,818,455 2,564,242 254,213 2018/Feb 19,696,488 16,836,378 2,860,110 2,605,067 255,043 2018/Mar 19,786,997 16,897,240 2,889,757 2,610,239 279,518 2018/Apr 19,874,106 16,978,714 2,895,392 2,649,666 245,726 2018/May 19,908,072 17,030,670 2,877,402 2,652,183 225,219 2018/Jun 19,894,575 17,066,113 2,828,462 2,653,830 174,632 2018/Jul 19,949,244 17,085,693 2,863,551 2,693,923 169,628 2018/Aug 20,063,433 17,182,201 2,881,232 2,707,388 173,844 2018/Sep 20,192,960 17,281,192 2,911,768 2,717,867 193,901 2018/Oct 20,356,179 17,408,758 2,947,421 2,749,745 197,676 2018/Nov 20,457,926 17,480,130 2,977,796 2,749,458 228,338 2018/Dec 20,079,365 17,229,742 2,849,623 2,597,677 251,946 Promedio 19,982,627 17,099,213 2,883,414 2,662,607 220,807 2019 2019/Jan 20,174,011 17,266,442 2,907,569 2,631,923 275,646 2019/Feb 20,299,993 17,354,643 2,945,350 2,664,060 281,290 2019/Mar 20,348,508 17,399,580 2,948,928 2,661,168 287,760 2019/Apr 20,378,927 17,433,079 2,945,848 2,671,344 274,504 2019/May 20,382,910 17,473,743 2,909,167 2,681,070 228,097 Promedio 20,316,870 17,385,497 2,931,372 2,661,913 269,459  Nota: Los datos anuales son un promedio aritmético de los doce meses. Excepto para los años 1997 y 2018 respectivamente. 1 A partir de julio de 1997, el Instituto Mexicano del Seguro Social (IMSS) modificó la metodología para registrar el número de Trabajadores Asegurados. 2 Excluye los grupos de seguro facultativo, estudiantes y continuación voluntaria.  Fuente: Dirección General de Investigación y Estadísticas del Trabajo con datos del IMSS.