Approximately 70% of U.S. adults placed a wager of some type in 2009. Americans wagered approximately $900 billion at casinos and racetracks, playing lottery games, and on other forms of legal betting. Gross gaming revenue the amount retained by casinos, race tracks, lotteries, and other gaming hosts totaled $80.5 billion in 2009. Casinos, Gaming & Wagering 2010 provides an in-depth analysis of the entire scope of these activities.