Originally Posted by
TrueBlueFlyer
Are there any statistics for that somewhere... what percentage of the American public actually travels abroad? I know many New Yorkers hardly leave their boroughs in their lifetime,

From a
2008 report (PDF) from the United States Government Accountability Office:
According to State data, about 28 percent of the U.S. population has a passport, with 85.5 million U.S. passports in circulation as of February 2008.