That's one way of putting it. Another is arrests are up 20% and mj use is up 40%.
"You lost me-- your data shows more arrests."
The arrests are not keeping pace with the number of users.
I gave you data (playing along with your invalid NHSDA numbers for the sake of argument) which showed a positive correlation between increasing arrests and increasing drug use, and vice-versa (post #270):
1970-1979: Arrests double, while past-month usage reaches a peak.
1979-1991: Arrests decline by 25%, past-month usage declines to a multi-year low.
1991-2004: Arrests up over 150%, past-month usage up 40%!