16 Dec 2012
Concise. Accurate. Perfect. Just perfect.
(credits: Looks like graphjam.com is now part of cheezburger.com empire, which confused tracking down the original author. Digging around, I found a few versions of this on different sites going back through 2011. I *think* its originally from Nathan Yau on flowingdata.com, or Garr Reynolds, posted here but if you know anything about the original author, please let me know.)