Comment by tracker1

Even by the pound would be hard... quality two-ply vs low-grade gas station TP... The price per unit is also difficult to compare... are you getting the costco packs that still have the larger per-sheet area or the new, smaller sheets.

Not to mention, in general it might be a counter-intuitive index... If the spend per person on TP on average goes down, is that an uptake in bidets, lowered tp costs, or economic affects and people choosing cheaper options?

That said, I still think it could be a "fun" index to track over time.