Rick Nevin provides updated graphs, one of the four posted here, in his post Update: Juvenile crime still falling fast in 2021 (4/2/2023).
USA arrest rates by age have only been updated through 2020, but juvenile arrest data reported by 10 states (FL, TX, CA, NY, VA, TN, WA, SC, GA, NC) show the trend toward zero juvenile crime continued in 2021. Weighted average data for these 10 states (accounting for about half of the USA population) show the following changes in juvenile arrests from 2020 to 2021:
Burglary: Down 34%
Motor Vehicle Theft: Down 13%
Other Felony Larceny-Theft: Down 28%
Total Felony Property Crime: Down 29%
Robbery: Down 23%
Aggravated Assault: Up 7% (after a 29% decline from 2019 to 2020)
Total Violent Crime: Down 5%.
There is a link to the data and he ends with this:
The impact of birth year trends in lead exposure is the only criminology theory that can explain this extraordinary ongoing decline in juvenile crime.