This video shows the distribution of the U.S. population according to age from 1950 to 2100. Declines in immigration have reduced population momentum by limiting the number of young adults of reproductive age who are moving to the United States and starting families. The future size of the older population relative to the population of children and working-age adults will depend in part on trends in immigration.
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Source: United Nation
Music: Jeremy Blake - Haven and Hell
![](https://i.ytimg.com/vi/dEDJoIlgBnk/maxresdefault.jpg)