According to Nevada Gaming Control Board statistics, there were about 197,000 slot machines in that state that won roughly $4.8 billion from gamblers in 1997. By 2007, the number of slot machines increased just 2.5 percent to 202,000, but the amount they won from gamblers jumped 72.9 percent to about $8.3 billion. This is primarily because slot design became far more advanced in fleecing and exploiting users.
