Redbook mintage figures, as well as NGC online census would be a start...

Depending on what kind of mintage figures you're looking for, The Redbook guide to United States Coins is a great start. They publish all of the mintages of most of the coins minted by the United States. I'm sure if you found a copy, you could find out the mintages. NGC Census provides a reference as to how many coins were graded in a particular grade, and of a particular type. As far as how many products of a certain type the Mint sold, I'm not entirely sure where to find those figures, but CoinWorld sometimes posts these kinds of numbers.

Munkyman95