Table 1.

Percent of Americans born between 1840 and 1960 surviving to ages 15 and 45

Birth	Surviving to age 15 (%)		Surviving to age 45 (%)
	Men	Women	Men	Women
1840	62.8	66.4	48.2	49.4
1880	71.5	73.1	58.3	61.1
1920	87.6	89.9	79.8	85.8
1960	99.0	99.2	94.1	96.1

Reprinted from ref. 8.