DPF pointed to the annual "Freedom in the World" survey from Freedom House. Every year they rate countries for political rights and civil liberties, then divide them into three broad groups: free, partly free, and not free.
While their charts and graphs [PDF] are interesting in showing the growth of freedom in the last thirty years and its distribution around the world, the core table is a little hard to use. So here's a map. Free countries are coded green, partly free countries yellow, and non-free countries red:
(Click for larger version).
What's most apparant is how far we have to go yet. But at least things are generally heading (albeit slowly) in the right direction...