I'm at around 225 since January of 2000. I don't know the exact number for sure. I was around 100 at the end of last year, followed by about two months off, then increased use to about 100 in the last three months.
I started getting dizzy/nausea spells for about two days after each session and couldn't sleep, so I decided to quit for a while and take 5-HTP plus multivitamins daily. Maybe in a few months I'll be able to roll face on just a pill or two again, and without the sickness.
BTW, as far as mental capacity/verbal acuity/etc. is concerned, I can't say that all that X has had a noticeably deleterious effect. I seem to be just fine in that respect, at least I hope.