The first time we ran out of toilet paper in the master bedroom of our current house, (we have been here 6 years) I started putting the roll on the toilet tank lid.
To the best of my knowledge, that empty roll on the dispenser is the original one via July 1997.
Squinney can't tell me because she won't share a bathroom with me, she shares with the two little cubs and me and the big cub each have our own.
I guess when my youngest cub reaches puberty and becomes a man/bear/pig, we'll have to build a fourth bathroom