Recent news releases from the Bureau of the Census1 based on the 1940 decennial census provide information on the present composition of the population of the United States and on trends now in evidence. If the present birth and death rates continue, the population of the United States will fail to maintain its numbers by approximately 4 per cent per generation. This contrasts with 1930 birth and death rates; if continued, those rates would have resulted in an increase of population of about 11 per cent per generation. Obviously at some time during the decade 1930-1940 the birth and death rates changed so as to pass the critical point at which the population would remain stationary. The decline in the net reproduction rate during this period was greater for the white than for the nonwhite population. In 1940 the net reproduction rate of the white population (including the Mexicans)
OUR POPULATION. JAMA. 1941;116(14):1526. doi:10.1001/jama.1941.02820140038010
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