1931 - 1960 1936 1953

1961 - 1970 1961 1963 1965 1966 1967 1968

1971 - 1980 1973 1976

1981 - 1990 1982 1983 1984 1986 1987 1988 1990

1991 - 2000 1991 1993 1994 1999

2001 - 2010 2001 2003 2008 2010

2011 - ... 2012