The end of the boom is generally considered to be October 2006, when the Unlawful Internet Gambling Enforcement Act of 2006 (UIGEA) became law in the United States, and several online poker sites, including the industry leader at the time, Party Poker, left the United States. In the first WSOP following the passage of UIGEA, attendance in the WSOP Main Event dropped nearly 28%, from 8773 in 2006 to 6358 at the 2007 Main Event.