Thanks for posting this interesting statistic. Made me look for more. I found it at the following site, especially the pocket guide. https://www.bts.gov/sites/bts.dot.gov/files/2021-12/PG Full with covers for the web.pdf Monthly data points...
If mine was interesting, yours looks to be comprehensive &……very very interesting! Bridge conditions were considered poor in 10% to 20%(?) of Illinois, Massachusetts, RI, & W.Virginia. Lots of other states, not far behind. Oh, boy!
Yes, since they rate my Washington state as OK (which it is NOT), huge numbers of other states must have bridges ready to collapse.
