Clinton earned nearly $40 million in speaking fees in the past six years, the Washington Post said Friday, giving nearly a speech a day in 2006.
Last year, however, about 80 percent of his 352 talks were said to be for no fee or for donations to the non-profit William J. Clinton Foundation for various causes, the Post said.
The former president addressed a variety of audiences in the United States, for which he often got $150,000 per speech, and groups abroad where he could command more.
Many of Clinton's six-figure speeches were made to top backers of his wife, Sen. Hillary Clinton, D-N.Y., who is seeking the Democratic presidential nomination.
The Clintons are estimated to be worth as much as $50 million, according to disclosure forms from Hillary Clinton.
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