From 2010 randomly generated number combinations were used.
1976 | A/VA |
1977 | B/VB |
1978 | C/VC |
1979 | D/VD |
1980 | E/VE |
1981 | F/VF |
1982 | G |
1983 | H |
1984 | I |
1985 | J |
1986 | K |
1987 | L |
1988 | M |
1989 | N |
1990 | O |
1991 | P |
1992 | Q |
1993 | R |
1994 | S |
1995 | T/W |
1996 | V/U |
1997 | Z/U |
1998 | Z/W |
1999 | X |
2000 | AB |
2001 | DE |
2002 | DT |
2003 | AD |
2004 | CL |
2005 | MA |
2006 | OP |
2007 | EO |
2008 | PJ |
2009 | LT |
2010 | RS |