It's way too common to read articles where clearly cherry-picked prose takes the place of a more informative graph, only to lookup said graph and find that the article seems to be trying to intentionally distort the data to make some point.
Here's more complete data, the US population was 250 million in 1990, 330 million in 2021. So the 7400 that year was ~8400 in 1990 if it's adjusted for population growth:
https://www.planetizen.com/news/2019/07/105095-us-pedestrian...