China recently announced plans to loosen its infamous one-child policy. As the country grows richer and the pace of population growth slows, the country has a new demographic concern: underpopulation.

Note: 1. Foreign born includes Puerto Ricans in this analysis. 2. “Second generation” refers to people born in the United States, with at least one parent born in another country or in Puerto Rico.

Note: Family households are those with a household head and one or more persons living in the household who are related to the household head by birth, marriage or adoption. Households with a ...