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Washington and Jackson may be lining your pockets, but Benjamin's been making a run for the border. One-dollar bills and hundreds make up the vast majority of U.S. currency, according to the 2015 World Almanac. There are 10.7 billion ones in circulation, and 9.7 billion hundreds.

Twenty years ago, hundreds made up only 14 percent of the bills in circulation, now they're more than a quarter. The other common denominations have all dropped in frequency, except twos which still make up 3 percent of bills.