From Delaware to Hawaii. From 1999 through 2008. When the U. S. Mint completes this mega-popular series there will be 100 coins; one Philadelphia issue and one Denver issue for each of the 50 states. The mintages of these coins have been huge to satisfy the demand, but collectors report that finding super-duper quality pieces is a lot tougher than you might think. This set requires both the circulation strike and satin finish issues.