Very good questions.
** consulting my little Black Book of 25s **
Initially I was thinking I did have at least one from each year produced but realized that I do not have any from 2010. Any one want to sell me some?
As for years issued...
None were issued in 2006, 2007, 2014 or 2016. The most varieties were produced in 2008 and 2009 with very low production numbers on most. Bulldog Knives have SFOs in 2009 and 2010 and Northwoods in 2013 (the infamous Bullet Jacks which got me started on these little gems) and this year (Little Bays).
You can always check out the Great Eastern Cutlery website for full production lists from each year.