I started somewhere around '71 or '72 and can't tell you how many I have forund lol A lot of them were stolen, back in the late 80's, and the rest are still with me. I estimate around 400.
I have many from other years, but they are scattered in several places. I need to get organized. 8/
This year:
2011: 113
I had hoped to surpass last year's count, but June has been a lost month for me as I haven't done much detecting - maybe twice or so, and they were very short hunts. :-\ Hopefully things will be better by September or October.