Your math is terrible. If there are 3,432 bosses available each week, and 16 people attend them all (most do 24, but what the hell, let's use 16), then there are 54,912 boss kills. Divide that by 3, and 18,304 characters just completed their weekly.
Hell, at an average of 8 people per boss, 9,152 characters still get it done.
Work on your math, and your logic.