I was just thinking about this today, about how much time I spend reading, and the fact that it kind of comes and goes in spurts.
I'll have times when I'll read 3 or 4 books in a month, then times when I'm not actively reading anything for a month or so.
So far this year I've read I think 9 books, maybe 10. There are 6 or 7 more books I'll probably finish before the end of the year.
I'd say in an average year I probably average about 18-20 books a year, give or take a few.