The Super Bowl is the most popular event for the Nevada sportsbooks. They earned $7.2 million on the $99 million wagered on it in 2013. Because it attracts many unsophisticated bettors, as of January 2014 the books had made money on 21 of the previous 23 Super Bowls, with an average win of $5.5 million over the previous 10 years. The most profitable Super Bowl was in 2005, when the Philadelphia Eagles covered the spread against the favored New England Patriots, earning the books $15.4 million. The two losses were in 1995—when the San Francisco 49ers defeated the San Diego Chargers—and 2008—when the favored Patriots lost to the New York Giants, costing the books $2.5 million.