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PHOENIX, AZ (SNN-TV) – A record 50.4 million adults in the United States — roughly 20% of the population — are expected to combine to bet approximately $16B on Super Bowl LVII (57), according to survey results released today by the American Gaming Association.

The number of expected Super Bowl bettors is up 61% from last year’s survey. Kansas, Ohio, Maryland and Massachusetts have launched online sports betting since the last Super Bowl.

The $16B wagered on Sunday’s game between the favored Philadelphia Eagles and the Kansas City Chiefs is more than double last year’s estimates. The wagering totals include bets made with legal sportsbooks, illegal bookmakers or casually among friends. Sunday’s game will be the first Super Bowl to take place at a venue with a retail sportsbook on premises, as BetMGM operates a sportsbook at State Farm Stadium.

The Eagles were consensus 1.5-point favorites as of this morning. Caesars Sportsbook yesterday reported that 73% of the bets that had been placed — and 74% of the money wagered — was on the Eagles to cover the spread.