Healthcare is suddenly back on the U.S. political agenda, and it remains one of the most important and misunderstood issues in the country. On this episode of Numbers Geek, former Microsoft CEO and USAFacts founder Steve Ballmer explains the handful of key numbers he uses to understand and track the state of U.S. healthcare.

Finale: Most Important Numbers in the World
35:13

A picture of America in numbers
33:02

What Happened to the Middle Class?
22:48