What is approx. percentage of your total

I have about 75,000 albums and listen to 15.

Audiofeil, that's humorous. It's like saying "I've got a drawer full of silverware, but I use always use the same fork."

I kind of get into rotations of groups of LP's and those are on a separate shelf. I would say that my "rotations" are usually 50 or so at a time.
Maybe over the course of the year, I actually listen to about 1,000 or so different records.

I have about 2500 CDs or digital files and I probably do most of my listening to only about 20% on a regular basis, but its nice to have the variety when you want that other weird 5%