1968 - 1974
1975 - 1985
1985 - 1989
1989 - 2000
2001
2002 - 2004
2005 - 2006
2007
2008 - 2009
2010 - 2013
2013 - 2015
2015 - 2016
2018 - 2019
since 2019
