From the Washington Post's Wonkblog:
Late on Monday, Mitt Romney released his 2010 tax returns, showing that he paid 13.9 percent of his income in federal taxes. (His rate is relatively low because most of his money comes from investment income, which is taxed at a lower rate than wages.) But how does Romney stack up to previous presidential candidates? Here’s a chart for comparison:
Sources, caveats, details: I tried to use candidates’ tax returns two years before the election to compare with Romney’s, although that wasn’t always possible....MORE