TFR was low even back in the 1980s, and especially the 1970s. https://fred.stlouisfed.org/series/SPDYNTFRTINUSA https://fred.stlouisfed.org/series/SPDYNTFRTINU

TFR was low even back in the 1980s, and especially the 1970s. https://fred.stlouisfed.org/series/SPDYNTFRTINUSA https://fred.stlouisfed.org/series/SPDYNTFRTINUSA I am guessing the bump from late 1980s to 2000s was almost entirely due to immigrants, especially Latin American. Similar to a bump seen in other countries where immigrants coming from places with higher TFRs bumped it up, and within a couple decades, even those immigrant populations now have lower TFRs. https://ourworldindata.org/grapher/children-per-woman-un?tab=chart&time=1950..latest&country=USA~CAN~GBR~AUS~FRA~DEU~NOR~SWE~FIN~CHE~ITA~ESP https://ourworldindata.org/grapher/children-per-woman-un?tab...