A daily chart advent calendar

As usual, I'm late to the game. On November 30 The Economist published a daily chart advent calendar, a collection of the 24 most popular maps, charts, data visualisations and interactive features on their site this year plus a new chart for Christmas day. Not just the routine stuff. The first graph is the street price of cocaine in rich nations and adult usage in these countries. We're now on day ten; you're not allowed to peek ahead.