I have started coin collecting again after about 20 years of having some coins stuck in a closet box. I just received my Red Book 2009. Looking through some of the coin mintages, I see the mintage numbers. Sometimes to the left is a number in parenthesis. What is this number? I can't find a description anywhere in the book. For instance, a 1950 Franklin half dollar had a mintage of 7,742,123. The number to the left is 51,386. Does this have something to do with how many have been graded? Thanks for any input.
