I read fic for 17 years. Started with mostly Harry Potter and changed with every fandom I became part of.
I did a every rough calculation and came up with 15000 fics, but I would say it is more likely to be around 20000.

Form this kink meme? Hmm... maybe 30 fics? 50?
I have to admit that I enjoy reading the prompts more than the fics most of the time.