1990年代末至21世纪初，美国经济繁荣，生育率为每个妇女生2.00—2.05个孩子，而1980年代为1.8—1.9。
A buoyant US economy in the 1990s and early 2000s was accompanied by fertility rates of 2.00-2.05 children per woman, up from 1.8-1.9 in the 1980s.