The birthrate for teenagers has dropped 64 percent from its peak in 1991, the agency said. The 2015 rate was the lowest since the federal government began tracking teenage births in 1940.

“We’re reaching record lows every year,” Brady Hamilton, one of the authors of the study, told Reuters. “These declines are absolutely astounding.”…

“This nation has made remarkable, off-the-chart success on a pressing social issue that many of us considered unsolvable,” said Bill Albert, spokesman for the non-profit National Campaign to Prevent Teen and Unplanned Pregnancy.