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Table 1. Cases of sexually transmitted diseases reported by state health departments and rates per 100,000 population: United States, 1941–2005

Year* Syphilis Chlamydia Gonorrhea Chancroid
All Stages Primary and Secondary Early Latent Late and Late Latent Neurosyphilis Congenital
Cases Rate Cases Rate Cases Rate Cases Rate Cases Rate Cases Rate§ Cases Rate Cases Rate Cases Rate
1941 485,560 368.2 68,231 51.7 109,018 82.6 202,984 153.9 NR . 17,600 13.4 NR . 193,468 146.7 3,384 2.5
1942 479,601 363.4 75,312 57.0 116,245 88.0 202,064 153.1 NR . 16,918 12.8 NR . 212,403 160.9 5,477 4.1
1943 575,593 447.0 82,204 63.8 149,390 116.0 251,958 195.7 NR . 16,164 12.6 NR . 275,070 213.6 8,354 6.4
1944 467,755 367.9 78,443 61.6 123,038 96.7 202,848 159.6 NR . 13,578 10.7 NR . 300,676 236.5 7,878 6.1
1945 359,114 282.3 77,007 60.5 101,719 79.9 142,187 111.8 NR . 12,339 9.7 NR . 287,181 225.8 5,515 4.3
                                     
1946 363,647 271.7 94,957 70.9 107,924 80.6 125,248 93.6 NR . 12,106 9.0 NR . 368,020 275.0 7,091 5.2
1947 355,592 252.3 93,545 66.4 104,124 73.9 122,089 86.6 NR . 12,200 8.7 NR . 380,666 270.0 9,515 6.7
1948 314,313 218.2 68,174 47.3 90,598 62.9 123,312 85.6 NR . 13,931 9.7 NR . 345,501 239.8 7,661 5.3
1949 256,463 175.3 41,942 28.7 75,045 51.3 116,397 79.5 NR . 13,952 9.5 NR . 317,950 217.3 6,707 4.6
1950 217,558 146.0 23,939 16.7 59,256 39.7 113,569 70.2 NR . 13,377 9.0 NR . 286,746 192.5 4,977 3.3
                                     
1951 174,924 116.1 14,485 9.6 43,316 28.7 98,311 65.2 NR . 11,094 7.4 NR . 254,470 168.9 4,233 2.8
1952 167,762 110.2 10,449 6.9 36,454 24.0 105,238 69.1 NR . 8,553 5.6 NR . 244,957 160.8 3,738 2.5
1953 148,573 95.9 8,637 5.6 28,295 18.3 98,870 63.8 NR . 7,675 5.0 NR . 238,340 153.9 3,338 2.2
1954 130,687 82.9 7,147 4.5 23,861 15.1 89,123 56.5 NR . 6,676 4.2 NR . 242,050 153.5 3,003 1.9
1955 122,392 76.2 6,454 4.0 20,054 12.5 86,526 53.8 NR . 5,354 3.3 NR . 236,197 147.0 2,649 1.7
                                     
1956 130,201 78.7 6,392 3.9 19,783 12.0 95,097 57.5 NR . 5,491 3.3 NR . 224,346 135.7 2,135 1.3
1957 123,758 73.5 6,576 3.9 17,796 10.6 91,309 54.2 NR . 5,288 3.1 NR . 214,496 127.4 1,637 1.0
1958 113,884 66.4 7,176 4.2 16,556 9.7 83,027 48.4 NR . 4,866 2.8 NR . 232,386 135.6 1,595 0.9
1959 120,824 69.2 9,799 5.6 17,025 9.8 86,740 49.7 NR . 5,130 2.9 NR . 240,254 137.6 1,537 0.9
1960 122,538 68.8 16,145 9.1 18,017 10.1 81,798 45.9 NR . 4,416 2.5 NR . 258,933 145.4 1,680 0.9
                                     
1961 124,658 68.8 19,851 11.0 19,486 10.8 79,304 43.8 NR . 4,163 2.3 NR . 264,158 145.8 1,438 0.8
1962 126,245 68.7 21,067 11.5 19,585 10.7 79,533 43.3 NR . 4,070 2.2 NR . 263,714 143.6 1,344 0.7
1963 124,137 66.6 22,251 11.9 18,235 9.8 78,076 41.9 NR . 4,031 2.2 NR . 278,289 149.2 1,220 0.7
1964 114,325 60.4 22,969 12.1 17,781 9.4 68,629 36.3 NR . 3,516 1.9 NR . 300,666 159.0 1,247 0.7
1965 112,842 58.9 23,338 12.2 17,458 9.1 67,317 35.1 NR . 3,564 1.9 NR . 324,925 169.6 982 0.5
                                     
1966 105,159 54.4 21,414 11.1 15,950 8.2 63,541 32.9 NR . 3,170 1.6 NR . 351,738 181.9 838 0.4
1967 102,581 52.5 21,053 10.8 15,554 8.0 61,975 31.7 NR . 2,894 1.5 NR . 404,836 207.3 784 0.4
1968 96,271 48.8 19,019 9.6 15,150 7.7 58,564 29.7 NR . 2,381 1.2 NR . 464,543 235.7 845 0.4
1969 92,162 46.3 19,130 9.6 15,402 7.7 54,587 27.4 NR . 2,074 1.0 NR . 534,872 268.6 1,104 0.6
1970 91,382 45.3 21,982 10.9 16,311 8.1 50,348 24.9 NR . 1,953 1.0 NR . 600,072 297.2 1,416 0.7
                                     
1971 95,997 46.9 23,783 11.6 19,417 9.5 49,993 24.4 NR . 2,052 1.0 NR . 670,268 327.2 1,320 0.6
1972 91,149 43.9 24,429 11.8 20,784 10.0 43,456 20.9 NR . 1,758 0.8 NR . 767,215 369.7 1,414 0.7
1973 87,469 41.7 24,825 11.8 23,584 11.3 37,054 17.7 NR . 1,527 0.7 NR . 842,621 402.0 1,165 0.6
1974 83,771 39.6 25,385 12.0 25,124 11.9 31,854 15.1 NR . 1,138 0.5 NR . 906,121 428.2 945 0.4
1975 80,356 37.6 25,561 12.0 26,569 12.4 27,096 12.7 NR . 916 0.4 NR . 999,937 467.7 700 0.3
                                     
1976 71,761 33.2 23,731 11.0 25,363 11.7 21,905 10.1 NR . 626 0.3 NR . 1001994 464.1 628 0.3
1977 64,621 29.6 20,399 9.4 21,329 9.8 22,313 10.2 NR . 463 0.2 NR . 1002219 459.5 455 0.2
1978 64,875 29.4 21,656 9.8 19,628 8.9 23,038 10.4 NR . 434 0.2 NR . 1013436 459.7 521 0.2
1979 67,049 30.1 24,874 11.2 20,459 9.2 21,301 9.6 NR . 332 0.1 NR . 1004058 450.3 840 0.4
1980 68,832 30.5 27,204 12.1 20,297 9.0 20,979 9.3 NR . 277 0.1 NR . 1004029 445.1 788 0.3
                                     
1981 72,799 32.0 31,266 13.7 21,033 9.2 20,168 8.9 NR . 287 0.1 NR . 990,864 435.2 850 0.4
1982 75,579 32.9 33,613 14.6 21,894 9.5 19,799 8.6 NR . 259 0.1 NR . 960,633 417.9 1,392 0.6
1983 74,637 32.1 32,698 14.1 23,738 10.2 17,896 7.7 NR . 239 0.1 NR . 900,435 387.6 847 0.4
1984 69,872 29.6 28,607 12.1 23,131 9.8 17,829 7.6 NR . 305 0.1 7,594 6.5 878,556 372.5 665 0.3
1985 67,563 28.4 27,131 11.4 21,689 9.1 18,414 7.7 NR . 329 0.1 25,848 17.4 911,419 383.0 2,067 0.9
                                     
1986 67,779 28.2 27,667 11.5 21,656 9.0 18,046 7.5 NR . 410 0.2 58,001 35.2 892,229 371.5 3,045 1.3
1987 87,286 36.0 35,585 14.7 28,233 11.7 22,988 9.5 NR . 480 0.2 91,913 50.8 787,532 325.0 4,986 2.1
1988 104,546 42.8 40,474 16.6 35,968 14.7 27,363 11.2 NR . 741 0.3 157,854 87.1 738,160 301.9 4,891 2.0
1989 115,089 46.6 45,826 18.6 45,394 18.4 22,032 8.9 NR . 1,837 0.7 200,904 102.5 733,294 297.1 4,697 1.9
1990 135,590 54.3 50,578 20.3 55,397 22.2 25,750 10.3 NR . 3,865 1.5 323,663 160.2 690,042 276.4 4,212 1.7
                                     
1991 128,719 50.9 42,950 17.0 53,855 21.3 27,490 10.9 NR . 4,424 1.7 381,228 179.7 621,918 245.8 3,476 1.4
1992 114,730 44.7 34,009 13.3 49,929 19.5 26,725 10.4 NR . 4,067 1.6 409,694 182.3 502,858 196.0 1,906 0.7
1993 102,612 39.5 26,527 10.2 41,919 16.1 30,746 11.8 NR . 3,420 1.3 405,332 178.0 444,649 171.1 1,292 0.5
1994 82,713 31.4 20,641 7.8 32,017 12.2 27,603 10.5 NR . 2,452 0.9 451,785 192.5 419,602 163.9 782 0.3
1995 69,358 26.0 16,543 6.2 26,657 10.0 24,296 9.1 NR . 1,862 0.7 478,577 187.8 392,651 147.5 607 0.2
                                     
1996 53,240 19.8 11,405 4.2 20,187 7.5 20,366 7.6 NR . 1,282 0.5 492,631 190.6 328,169 121.8 386 0.1
1997 46,715 17.1 8,556 3.1 16,631 6.1 20,447 7.5 193 0.1 1,081 0.4 537,904 205.5 327,665 120.2 246 0.1
1998 38,290 13.9 7,007 2.5 12,696 4.6 17,743 6.4 279 0.1 844 0.3 614,250 231.8 356,492 129.2 189 0.1
1999 35,383 12.7 6,617 2.4 11,534 4.1 16,653 6.0 341 0.1 579 0.2 662,647 247.2 360,813 129.3 110 0.0
2000 31,618 11.2 5,979 2.1 9,465 3.4 15,594 5.5 334 0.1 580 0.2 709,452 251.4 363,136 128.7 78 0.0
                                     
2001 32,283 11.3 6,103 2.1 8,701 3.0 16,976 5.9 324 0.1 503 0.2 783,242 274.5 361,705 126.8 38 0.0
2002 32,918 11.4 6,862 2.4 8,429 2.9 17,168 6.0 387 0.1 459 0.2 834,555 289.4 351,852 122.0 48 0.0
2003 34,289 11.8 7,177 2.5 8,361 2.9 18,319 6.3 541 0.2 432 0.1 877,478 301.7 335,104 115.2 54 0.0
2004 33,419 11.4 7,980 2.7 7,768 2.6 17,300 5.9 833 0.3 371 0.1 929,462 316.5 330,132 112.4 30 0.0
2005 33,278 11.3 8,724 3.0 8,176 2.8 16,049 5.5 828 0.3 329 0.1 976,445 332.5 339,593 115.6 17 0.0

*For 1941-1946, data were reported for the federal fiscal year ending June 30 of the year indicated. From 1947 to the present, data were reported for the calendar year ending December 31. For 1941-1958, data for Alaska and Hawaii were not included.

Late and late latent syphilis includes cases of unknown duration, late syphilis with clinical manifestations, and neurosyphilis.

§For 1941-1994, rates include all cases of congenitally acquired syphilis per 100,000 population. As of 1995, rates of congenital syphilis < 1 year of age per 100,000 population are reported. For rates of congenital syphilis < 1 year of age per 100,000 live births. See Tables 37, 38, 39, 40. As of 1995, cases of congenital syphilis < 1 year of age are obtained in hardcopy and electronic format based on case reporting form CDC 73.126.

Note: Adjustments to the number of cases reported from state health departments were made for hardcopy forms and for electronic data submissions through June 7, 2006 (see Appendix). The number of cases and the rates shown here supersede those published in previous reports. Cases and rates shown in this table exclude the outlying areas of Guam, Puerto Rico and Virgin Islands.

NR = No report.

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