That's a very good point that I should have addressed. The cited ACLU article goes on to say: "King and Mauer (2005) estimate that at least 68,000 people were

That's a very good point that I should have addressed. The cited ACLU article goes on to say: "King and Mauer (2005) estimate that at least 68,000 people were in prison, on probation, or serving a jail sentence for a marijuana offense in 2003" So, that's 52% higher than the number I quoted for state prisons.