美国人口结构相反

Age structure:This entry provides the distribution of the population according to age. Information is included by sex and age group as follows: 0-14 years (children), 15-24 years (early working age), 25-54 years (prime working age), 55-64 years (mature working age), 65 years and over (elderly). The age structure of a population affects a nation's key socioeconomic issues. Countries with young populations (high percentage under age 15) need to invest more in schools, while countries with older population . . . more

0-14 years: 18.46% (male 31,374,555/female 30,034,371)

15-24 years: 12.91% (male 21,931,368/female 21,006,463)

25-54 years: 38.92% (male 64,893,670/female 64,564,565)

55-64 years: 12.86% (male 20,690,736/female 22,091,808)

65 years and over: 16.85% (male 25,014,147/female 31,037,419) (2020 est.)