Census.gov

Nationally, net census undercount was estimated from demographic analysis as 2.7 percent in 1970, 1.2 percent in 1980 and 1.8 percent in 1990 (U.S. Bureau of the Census, 1991). Since the population estimates were based on data from the previous census, an improvement in census coverage between 1970 and 1980 led to census counts that were ... ................
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