执行摘要2018年，美国约有1550万人，具有智力或发育残疾（I / DD） - 约占美国人口总数的4.75％。The proportion of the U.S. I/DD consumer population in the age group of 19 to 64 years increased slightly – from 8.6 million in 2014 to 8.7 million in 2018, while the age group from 5 to 17 years decreased slightly from 2.63 million in 2014 to 2.62 million in 2018. According to our analyses, in 2018, total public expenditures for . . .
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