Gambling Sporting Events Anyone Know Where I Can Find Information On Gambling?

Anyone know where I can find information on gambling? - gambling sporting events

I find statistics on how much money BET play the lottery, casinos, internet poker and other forms of gambling in the year. I would also like to know the total revenue generated and the problems created by legalized gambling in society. Also, is set as much money for sporting events like the Super Bowl. If I give a short presentation about DO in the United States for additional credit and want to simply go through a lot of statistics.