(CNBC) — A year ago, in Action Comics, Superman declared plans to renounce his U.S. citizenship.
"'Truth, justice, and the American way' — it's not enough anymore," the comic book superhero said, after both the Iranian and American governments criticized him for joining a peaceful anti-government protest in Tehran.
Last year, almost 1,800 people followed Superman's lead, renouncing their U.S. citizenship or handing in their Green Cards. That's a record number since the Internal Revenue Service began publishing a list of those who renounced in 1998. It's also almost eight times more than the number of citizens who renounced in 2008, and more than the total for 2007, 2008 and 2009 combined.
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But not everyone's motivations are as lofty as Superman's. Many say they parted ways with America for tax reasons.