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.