In 2016, the fertility rate in the United States was the lowest it has ever been.

There were 62 births per 1,000 women aged 15 to 44, down 1 percent from 2015. There were 3,941,109 babies born in 2016.

In an analysis issued by the National Center for Health Statistics, researchers report that birthrates declined to record lows in all groups under age 30. Among women ages 20 to 24, the decline was 4 percent. For women 25 to 29, the rate fell 2 percent.

The decrease in the birthrate among teenagers — 9 percent from 2015 to 2016 — continues a long-term decline: 67 percent since 1991.

“The decline in teens is across the board,” said the lead author, Brady E. Hamilton, a statistician and demographer with the center. “Younger teens, older teens, and across all racial and ethnic groups.”