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Your best bet for remaining in America and being satisfied with your lot? Don't be an uneducated white woman. Men, non-whites, and the college-educated are all happier than they were in the early 1970s, according to a new study. Americans, though, are hardly the happiest people on the planet: The US ranked 16th on the happy list; Denmark was rated the most cheerful nation and Zimbabwe came in dead last. Guess we'll see you in Copenhagen next week! [LiveScience]