I have been separating pennies for years into 3 categories, pre 1982, 1982, and post 1982. And for the 1982's I separate small dates from large dates. I was finding about 10% are small dates. I have 63 small date 1982p so far. Last night I weighed the small dates only and 36 were copper and 27 were zinc. This is 57% copper. Is this what others have found for the 1982 pennies?