I don't know and would be afraid to count. I think it would scare me. :P
It's a lot but for some reason I never have just the right color for a project and need to buy more. I also travel a lot in my job so visit shops all over the place and always come back with more. I manage to keep myself out of the LQS most of the time these days, so if I could only stop checking out the ones where I travel, I might make a dent in the stash!