81.21% - That's how many are zincs. As these are separated out from the rest, it is my primary objective to get them dumped. Lot's of money can be tied up there.
18.28% - Those are the copper memorial cents. For every roll of pennies I open I hope to find 10 of these but more often than not I don't
. They all get boxed up to become my copper hoard. The nicer AU/BU ones from the 60's and anything else that might stand out earn a spot in a different box but they are all part of the copper hoard.0.51% - That's all that's left - wheats, dimes, Canadian cents, various foreign coins, etc. From about every other roll I open I find one coin that doesn't go on either the zinc or the copper pile. Of all these "other" coins, wheats are the ones I find most often. Canadian cents for me are at 0.08%. I haven't found enough of them to bother sorting them out by design or metal composition.
Another intesting number is the 88.44% of the coins that have Lincoln Memorial on the reverse. The new reverse designs have not become so plentiful yet to make sorting by reverse design a way to catch the bulk of the zincs. Maybe in a few years that will all change.
Comparing boxes to CWRs, I have found that boxes have had a higher copper percentage (18.59% vs 17.60%). However, the chances of finding one of the "other" coins has been about the same for boxes and CWRs.
