Era
1945-
6
1990-
2
Since 1945
2
Since 1990
2
1946-
1
1948-1994
1
1960-
1
1961-
1
1961-1991
1
1966-1997
1
1966-1998
1
1970-
1
1972-
1
1974-
1
1975-
1
1975-1982
1
1975-2008
1
1976-
1
1976-1994
1
1979-1997
1
1980-
1
1981-
1
1981-1995
1
1982-
1
1983-
1
1983-2002
1
1984-
1
1985-
1
1985-2002
1
1986-
1
1991-
1
1994-
1
1995-2007
1
1997-
1
1998-
1
2002-
1
2003-
1
2007-2012
1
Since 1948
1
Since 1960
1
Since 1966
1
Since 1970
1
Since 1972
1
Since 1975
1
Since 1976
1
Since 1983
1
Since 1985
1
Since 1986
1