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一、人口比重: 美国青少年(10~19岁)人口比重,1985年占全人口的14.8%,1990年为13.5%,估计2000年为14.3%。具体数:1960年有29.9百万人,1970年有40.1百万人,1980年有39.4百万人(女19.3,男20.1),1990年33.8百万人(女16.5,男17.3),估计2000年有38.3百万人(女18.8,男19.5)。
I. Population Percentage: The proportion of the U.S. youth (aged 10-19), accounting for 14.8% of the total population in 1985, was 13.5% in 1990 and is estimated at 14.3% in 2000. Specific numbers: 29.9 million in 1960, 40.1 million in 1970, 39.4 million in 1980 (19.3 female; 20.1 male), 33.8 million in 1990 (female 16.5, male 17.3), estimated at 2000 There were 38.3 million people (18.8 in women and 19.5 in men).