It can vary pretty wildly. I've dialed back my consumption to an ounce of ~19% THC strains per two months for financial reasons. Which falls in line with some of my peer group (mid to late 30's friends). But I also live in a state where its still illegal recreationally so I don't have a shop around the corner yet. Meanwhile my friend in the same state with a medical card has a habit of grabbing their largest bong and pounding out 1 gram bowls sometimes consuming an ounce a week of 20-25% strains. Even if I had the money and access I doubt I could pull that off.