Importantly, Chinese immigration to the United States was encouraged. The treaty was reversed in 1882 by the Chinese Exclusion Act.
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... 24.7% under the age of 18, 7.4% from 18 to 24, 32.6% from 25 to 44, 23.2% from 45 to 64, and 12.2% who are 65 years of age or older. The median age is 37 years. For every ...