By the Numbers

How Many Women in the U.S.?
152 million
The number of females in the United States as of Nov. 1, 2006. That exceeds the number of males (148 million).
Motherhood
82.5 million
Estimated number of mothers of all ages in the United States.

1.9
Average number of children that women 40 to 44 had given birth to as of 2004, down from 3.1 children in 1976, the year the Census Bureau began collecting such data. Likewise, the percentage of women in this age group who were mothers was 81 percent in 2004, down from 90 percent in 1976.
Marriage
63 million
Number of married women (including those who are separated or have an absent spouse) in 2005. There are 55 million unmarried (widowed, divorced or never married) women.
17%
Percentage of married couples in which the wife earns at least $5,000 more than the husband in 2005. Among 22 percent of married couples, the wife has more education than the husband.
5.6 million
Number of stay-at-home mothers nationwide in 2005, up from 4.4 million a decade earlier.