1960 - 1961
1972 - 1974
1974 - 1975
1981 - 1983
1983 - 1984
1987 - 1991
1991 - 1992
1992 - 1997
1997 - 1998
1998 - 1999
1999 - 2003
2003 - 2011
2011 - 2016
2016 - 2017
since 2017
