WAG
发表于 2025-3-28 15:20:03
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挖掘
发表于 2025-3-28 21:36:33
Demographic Perspectivesere were 3 million persons over 65 years of age, which represented 4% of the total population. Elderly persons totalled 9 million or 7% of the population in 1940, and 24 million or 11% of the population in 1980. The United States Census Bureau estimates that elderly persons will number 57 million or