Sacagewa
http://en.wikipedia.org/wiki/Sacagawea_dollar
The program started in 2000. The design was unchanged until 2008.
starting from 2009 (until 2012) there has been one new design with lettering
on the edges as in the presidential coins.
2000-8 | |||
2009 (DP) | 2010 (D) | 2011 | 2012 |