1944 - 1970
1970 - 1981
1981 - 1982
1982 - 1983
1983 - 1990
1990 - 1993
1994
1995 - 1996
1996 - 1997
1997 - 1998
1999 - 2007
2004
2007 - 2008
2008 - 2016
2009 - 2010
2016 - 2018
since 2018
