Here are the two monthly reports for Nevada gaming, with May 2013 numbers:
Nevada Gaming Statistics: The Last Six Months
Recent Trends for Casino Revenues, December 2012 to May 2013
Nevada Gaming Statistics: May Comparison
Statewide, Las Vegas Strip, Downtown Las Vegas, Boulder Strip, and Washoe County figures for the month of May, 2004-2013
Click for the executive summary, stay for the numbers.