Explore the interactive visualization below to learn more about illicit drug prices and purity from 1986-2012. The colored lines represent different drugs: meth, heroin, cocaine, and crack. Thicker and darker line segments mean higher purity of the drug. Dotted lines represent drug quantities purchased at the “retail” level (less than 10 pure grams). Solid lines represent drug quantities purchased at the “dealer” level (10 -100 pure grams). Hover over the colored lines to see price and purity.