It will be interesting to see what the US resembles when its numbers exceed 1 billion people. China in many ways is simply setting the precedent now, how the US follows remains to be seen.
https://ourworldindata.org/fertility-rate
https://d33wubrfki0l68.cloudfront.net/2c9342e9aa17d2237eade9...
https://www.gapminder.org/videos/dont-panic-the-facts-about-...
https://en.wikipedia.org/wiki/Total_fertility_rate#Populatio...
https://www.bloomberg.com/view/articles/2018-03-16/decline-i...