"Golf is a $65 billion industry"

Outgoing PGA of America president Roger Warren, talking to Tommy Braswell in the Post and Courier of Charleston:

"Golf is a $65 billion industry in this country. One thing we have been trying to do is raise people's awareness around the country about that industry. Not just the person that pays greens fee on Saturday morning to play golf. There's so much more to it, the real estate associated with golf, the tournaments, the manufacturing."

Anyone ever heard that $65 billion number before? I know PGA Tour Vice Presidents are making a lot, but...it seems a bit high.