Can you provide a link to the chart you speak of? I couldn't find such a thing on their site.
They must have taken it down. The chart was upposed to show a corrolary between the 20's and 80's when prohibition showed sharp spikes in crime.
The other thing the chart showed was during the 50's when marijuana, cocaine, and heroin, were all illegal, the 50's had some of the 20th century's lowest crime rates. Kinda of put the kibosh on their contention that "prohibition" brings higher crime rates.