[ska]

Okrent had it calculated at equivalent to 7 US gallons of pure ethanol/yr (1830s) to normalize this.

So approx 17.5 gallons at today's standard of 40%. Which is about 2250 standard (1.5oz) drinks a year, or average of 6/day.

There are higher and lower estimates too, but anyway you work the calculations, it's a lot.