 1969 1968 base |
 1969 Undated (1969-1973) base |
 1970 |
 1971 |
 1972 |
 1973 |
 1974 Maine dies |
 1974 Polyvend dies |
 1976 Undated base |
 1977 |
 1978 |
 1979 State name centered |
 1980 |
 1981 |
 1982 |
 1983 Series ends at 599-999 |
 1983 Single Alpha prefix begins |
 1984 |
 1985 |
 1986 |
 1987 Bordered |
 1987 Borderless |
 1988 Borderless |
 1988 Border replaced, serif '1' |
 1989 General reissue |
 1989 F series |
 1989 G series |
 1990 |
 1991 |
 1992 |
 1993 |
 1994 Wide die |
 1994 Narrow die, c. K 80000 |
 1995 Narrow state name die |
 1996 Series ends at L 99999 |
 1996 Seven digit |
 1997 |
 1998 |
 1999 Revised Caption |
 2000 (green sticker) Seven-digit |
 2000 (standard sticker) Wide state name die |
 2001 |
 2002 |
 2003 |
 2004 |
 2005 |
 2006 |
 2007 |
 2008 A series |
 2008 B series |
 2009 |
 2010 |
 2011 |
 2012 Revised Caption |
 2016 |