Seven Million Copies Sold

Once in a while, we get a report from our publishers about how many copies of Freakonomics and Super Freakonomics have been sold around the world. Last we heard — it was a while ago — we were at 5 million.

The latest report tells us we’ve just breached the 7 million mark. Here’s a rough breakdown:

• United States: 4.4 million
• United Kingdom: 1.65 million
• Translated editions: 1 million

With the global population at around 7 billion, those 7 million copies represent a nice round number: 1 book sold for every 1,000 people on the planet.

With Think Like a Freak coming out next week, I hope we get to 10 million copies before there are 10 billion people on Earth.