Former President Bill Clinton's 8,300-square-foot Harlem office near the Apollo Theater costs taxpayers nearly $450,000. George W. Bush spends $85,000 on telephone fees, and another $60,000 on travel. Jimmy Carter sends $15,000 worth of postage — all on the government's dime.

The most exclusive club in the world has a similarly exclusive price tag — nearly $3.7 million, according to a new report from the nonpartisan Congressional Research Service. That's how much the federal government spent last year on the four living ex-presidents and one presidential widow.

Topping the list in 2012 was George W. Bush, who got just over $1.3 million last year.