I would say yes, but only if its replaced and not moved (so pit toilets would be difficult to count), this way the result is the shittiest place on earth. With the advent of modern plumbing, most commodes are less than a century old, but we have to account for past use, I would think the latrines at the Coloseum in Rome would be high on the chart but they are no longer in use (your going to get weird looks taking a dump in a dig site).