90 of them are used in 2 cells: Lair of the Udyfrykte (30) and in Castle Karstaag, Banquet Hall (60).
Not sure what the reference is, but I was just wondering. Thanks...

If this belong in the CS side, AKA The Ass End of Space, my apologies.

Statics don't normally need to be flagged persistent, so it may have been an oversight for Bethesda to do that with this one, but it should be harmless.