0! Yes, ZERO! That's none! The local range I had been going to has been closed for a few months. Also, I can't get the bolt on my new AR-15 to close over the top of a magazine. Because of that, I don't feel like driving the 102 miles to my usual range. It just isn't worth it to only fire my 22LR rifle when I know that I have an AR-15 at home that I might be able to one day figure-out how to fix. It sucks not having somewhere local to shoot. I'm almost to the point of buying an airgun. I would buy one if I had a basement to shoot it in. For that matter, if I had a basement, I've got enough scrap 2" thick iron plates to make a nice backstop.
A better question would be how many rounds do you WANT to shoot per month? My answer would be about 3000. 100 rounds per day sounds about right. 50 pistol rounds (assuming I owned one), and 50 223 rounds would be great. I can dream...