data, data, data

The U.S. teen birth rate (births per 1,000 females ages 15-19) has been on a steep decline since the early 1990s. It peaked at 61.8 in 1991, fell to 15.4 by 2020, and hit a record low of 13.2 in 2023—a 79% drop from that peak. That’s a huge shift: in 1991, there were over 500,000 births to teens annually; by 2023, it was down to about 130,000.

While men are nearly 18 percent faster than women in 5K races, they are only 11 percent faster in marathons, 3.7 percent faster at 50 miles, roughly even as they approach 100 miles, and then women routinely outpace men at races 195 miles and up