"They" being the Colorado Department of Revenue, and "it" being marijuana, of course. Beginning in 2014, recreational sales of marijuana were finally legal in the (Mile) High State.
Overall, legalization has worked out pretty well. Crime is down, tax revenues are up, and everyone is happy (well, except for neighboring states grumbling about drug trafficking). Here are five charts showing how the program has fared. And yes, these charts look way cooler under a blacklight.
Recreational weed was a big hit