You, yourself, pointed out that per capita alcohol consumption increased each year of prohibition.
Just making observations.
Yes. Alcohol.
Not drugs. Not marijuana. After the Controlled Substance Act was passed, marijuana use dropped 50% and has remained at 6-7% for the last 20+ years. In my opinion, that's as low as it's going to go with current laws.
And where would they get such information? From the government reports that get filed about all the illegal consumption that was going on?
Think man, how can such a claim be even remotely true? Who would collect this information and how?
As with most things Libertarians say, it has the smell of made up bullsh*t. If you haven't noticed by now, let me point it out to you. Libertarians MAKE UP BULLSH*T and then repeat it endlessly until it gets spread by others. Eventually it take on the form of "Everybody knows that." Which is their whole intention for making it up in the first place. It is an ongoing effort to muddy the truth of things, and they've been working at it for decades.