LAS VEGAS (KLAS) — Las Vegas has long been the center of the gambling world, but as sports betting becomes legal in other states, more and more people are getting in on the action. A survey done by the American Gaming Association shows more than 38 million American adults plan on betting on NFL games this season.

While many of those bettors will be acting illegally, an increased number of gamblers are going through legal sportsbooks that are popping up in the U.S. The number of bettors saying they will place their bets in-person at a casino sportsbook is 6.9 million people, up from 5.7 million who say they placed a similar bet last year. In addition, tens of millions of others will bet online, play in local pools or bet with friends.

39% of avid NFL fans plan to place a bet this season. 75% of bettors say they are more likely to watch a game they have bet on.

This survey polled 11,001 American adults online. Other research from the AGA shows the NFL will make $2.3 billion from widespread legalized sports betting.