TABLE 2.

Frequency of MSM-Ever, Non-MSM, and Exclusions Among Men (Ages 18–59 Years) by NHANES Survey Cycle, 1999 to 2014

Survey Cycle	MSM-Ever*	Non-MSM	Never Had Sex†	Missing Ever Had Sex‡	Missing Male Partners§	Total
1999–2000	57	1022	95	93	6	1273
2001–2002	56	1335	60	128	5	1584
2003–2004	57	1159	48	154	7	1425
2005–2006	79	1062	212	166	3	1522
2007–2008	83	1311	200	191	10	1795
2009–2010	85	1674	107	238	7	2111
2011–2012	84	1501	117	231	0	1933
2013–2014	97	1586	108	183	1	1975
Total	598	10,650	947	1384	39	13,618

During the survey cycles between 1999 and 2008, data were not publicly available on participants aged 18 to 19 years and are subsequently not included in the analysis.

^*MSM-ever indicates participants reported at least 1 lifetime male sexual partner (during the cycles between 1999 and 2008) or reported ever having any kind of sex with a man (during the cycles between 2009 and 2014).

^†Participants who reported never having sex met the criteria for neither MSM-ever nor non-MSM and were excluded.

^‡Participants who had missing data on ever having sex met criteria for neither MSM-ever nor non-MSM and were excluded.

^§Participants who responded “yes” to ever having sex and had missing data on number of male sex partners (1999–2008), or ever having sex with a man (2009–2014) met the criteria for neither MSM-ever nor non-MSM and were excluded.