Table 1.

Sample sizes of component surveys and educational distribution

NSFG survey year	Total N	Analytic sample	Proportion with no high school diploma	Proportion with high school diploma	Proportion with some college	Proportion with bachelor’s degree or higher
1973	9797	1,064	0.33	0.43	0.14	0.10
1976	8611	894	0.31	0.43	0.16	0.11
1982	7969	493	0.19	0.43	0.24	0.15
1988	8450	813	0.14	0.37	0.25	0.23
1995	10847	1,453	0.11	0.38	0.24	0.27
2002	7643	917	0.12	0.34	0.29	0.25
2006–2010	12279	1,307	0.09	0.35	0.27	0.29
2011–2015	11300	1,159	0.11	0.22	0.26	0.40

Data: National Surveys of Family Growth. Unweighted counts, weighted proportions. Analytic sample includes women age 40–44 without missing data on tubal sterilization, education, first birth timing, marital status, or contraceptive use. Sample excludes women with other sterilizing operations (hysterectomy, oophorectomy, and other non-contraceptive sterilizing operations).