how much weed do you need in a year?

[west coast style]

I go through probably 1-2 ounces in a week. Since January of this year, I've gone through probably over 20 ounces (which is over a pound). I picked up a half ounce yesterday and I only have an 1/8 left. I'll easily surpass several pounds this year. Last year I probably went through plenty of pounds.