Select a year
| 1988 | 1989 | 1990 | ||
| 1991 | 1992 | 1993 | 1994 | 1995 |
| 1996 | 1997 | 1998 | 1999 | 2000 |
| 2001 | 2002 | 2003 | 2004 | 2005 |
| 2006 | 2007 | 2008 | 2009 | 2010 |
Chad
Information regarding these stamps can be found on the counterfeit stamp page.
El Salvador
Scott number unknown
Ghana
Scott numbers unknown
Ghana released this souvenir sheet in honor of President Bush's trip to Africa to promote American foreign policy on AIDS.
Macedonia
Scott numbers unknown
Macedonia releases postal tax stamps annually. These are from two different issues this year, in December and March respectively.
Mongolia
Scott number unknown
Papua New Guinea
Sao Tome and Principe (St. Thomas)
Scott number unknown
I have the sneaking suspicion these stamps may not be legal, but at present I have no evidence to support my hunch.