In 2002, there were no billionaires in China. In 2007, there were 106 billionaires.
If you had 10 billion $1 notes and spent one every second of every day, it would require 317 years for you to go broke.
In 75% of American households, women manage the money and pay the bills.
Steve Jobs' annual salary was $1, just enough to keep company health benefits.
Coins usually survive in circulation for about 30 years.