2015 March of Dimes set 0

[Ken Thomson]

Spoiler

 

Been out of coin collecting for last 15 years but decided to buy silver when the virus started.

Bought lots of early commemorative silver dollars before I bought a Red Book and discovered that for a few dollars more I could get dollars with a mintage of 1-2% of the more common early examples.

One of these is the March of Dimes sets with the dollar and the W mint dime and reverse proof dime. The Red Book shows a mintage for the proof $1 at 32,030 but the mintage for both the dimes 74,430.

As far as I can tell, you needed to buy the 3 coin set to get the dimes so why are there 42K more of each dime than dollars?

[Morpheus1967]

You could purchase the dollar separately, by itself, prior to the 3 coin set coming out.  I'm wondering if you are seeing the mintage numbers of the dollar by itself, then the mintage numbers of the 3 coin set.  There is also an uncirculated version of the dollar as well.  (no mint mark).