TABLE 1.

Sample Sizes and Survey Years For Each Age Group and Birth Cohort: California Tobacco Survey, 1990–2005

		Sample Size and Survey Year
Birth Cohort	Year Surveyed at Age 12–14 y	Age 12–14 Years, No. (Year)	Age 15–17 Years, No. (Year)	Age 18–20 Years, No. (Year)	Age 21–23 Years, No. (Year)	Age 24–26 Years, No. (Year)	Total Cohort, No.
1976–1978	1990	2562 (1990)	2660 (1993)	1062 (1996)	884 (1999)	2123 (2002)	9 291
1979–1981	1993	2835 (1993)	3030 (1996)	1007 (1999)	2275 (2002)	1267 (2005)	10 414
1982–1984	1996	3183 (1996)	3054 (1999)	2912 (2002)	1262 (2005)	…	7 790
1985–1987	2009	2999 (1999)	2882 (2002)	1845 (2005)	…	…	7 726
1988–1990	2002	2923 (2002)	2250 (2005)	…	…	…	5 173
1991–1993	2005	2172 (2005)	…	…	…	…	2 172

Note. Survey period was every 3 years.