Nowhere near as much as when that drug was illegal - and nowhere near as much as is the case for currently illegal drugs.
You’re kidding, right? Add to the fact people all over are into home brews and making wine.
No, I'm not kidding. Do you have evidence that homemade alcohol, legal and illegal, is more than a drop in the bucket of the commercial alcohol market?
Sure, the commercial stuff is a billion dollar industry but if you think making drugs legal is going to get rid of the black market, you are kidding yourself.