Maybe they meant something else.
Data from the US Department of Justice for 2019: https://bjs.ojp.gov/sites/g/files/xyckuh236/files/media/docu...
> By the end of 2019, the incarceration rate had dropped to the same rate as 1995 (810 per 100,000 adult U.S. residents).
Which is about 1 in 123.
> About 1 in 40 adult U.S. residents (2.5%) were under some form of correctional supervision at the end of 2019. This represented a drop from 1 in 32 (3.1%) a decade earlier.
The above includes people on probation or parole.