Opposition to democracy

Ran across the following graphic while doing some digging on the theme of "democracy." This map accompanies the wikipedia entry on democracy under the section of "Opposition to Democracy."


The caption reads:

"This is one attempted measurement of democracy called the Polity IV data series. This map shows the data presented in the polity IV data series report as of 2003. The lightest countries get a perfect score of 10, while the darkest countries (Saudi Arabia and Qatar), considered the least democratic, score -10."

I had no idea there even was a Polity IV data series. . . .