The past 20 years? Not much at all. I think I found 1 quarter and a couple dimes. If you go back another 5 - 10 years I found quite a few. I was working
as a clerk at a beer and soda outlet, and you would not believe how many people would spend their coin collection to get some booze. I gathered quite a few
quarters and dimes dating around 1907-1927, 100's of wheat pennies, and I know of 1 morgan silver dollar dated 1897. I remember an older woman maybe in
her 70's came in with rolls of coins that had been collected by her deceased husband. She asked if I would mind taking them to buy beer and soda and save
her a trip to the bank. I agreed and accepted a roll of dimes and 10 rolls of pennies. She was a little short in coins for what she wanted to buy, so she then pulled
out some $1 Silver certificates. Over the next few weeks she returned with more coins and older paper money for booze. I never found anything of great value
in the coins, but it sure gave me a quick start in my coin collection.