I noticed when we first arrived that some of the quarters (quarter of a dollar – single coin) had various states on them. Figured I might try and collect them all – until tonight when I found out just how many there are already out. Seems that approximately every 10 weeks, the U.S Mint is releasing a new state on the quarters. Unfortunately for me, this means that it takes from 1999 – 2009 to produce the whole set!