What’s your source for that graph.
I am pretty sure it is reporting low percentages.
Look at the date 2012 this is 2018, there should be 2016 or 17 data out there as not current data is misleading, same out of date data they are using on the “Fake Opioid Crisis”.
Even criminal recividisim data is more current within 2 yrs. But is is misleading too. 48 states with 45% of inmates studied does not produce accurate data, especially as crime is Hieracheal counted and only the most serious offense is counted, rest flushed down toilet.