The stability in fertility rates among American women at the close of the century is in sharp contrast to the wide swings in fertility rates that occurred in preceding decades. Annual total fertility rates fell from almost 4.0 births per woman at the turn of the century to 2.2 births per woman during the Great Depression. They subsequently rose to a postwar peak of 3.7 births per woman in 1957, but fell again by half to 1.8 births per woman in the mid-1980s. With minor fluctuations, the rates have remained at approximately 2.0 births per woman over the last 20 years (the level required for the natural replacement of the population is about 2.1 births per woman).
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Current Population Survey