The Federal Register, the government publication that records such decisions, shows that 502 expatriates gave up their U.S. citizenship or permanent residency status in the last quarter of 2009. That is a tiny portion of the 5.2 million Americans estimated by the State Department to be living abroad.

[…] American expats have long complained that the United States is the only industrialized country to tax citizens on income earned abroad, even when they are taxed in their country of residence, though they are allowed to exclude their first $91,400 in foreign-earned income.

Quelle: More American Expatriates Give Up Citizenship – NYTimes.com