| | | 1973 2 | | 1991 6 | | | | | | 1991 6 1997 8 | | | 1997 8 2002 4 | | 2002 4 2003 5 | | 2003 5 2004 7 | | | | 2004 7 2006 7 | | 2006 7 2009 2 | | 2009 2 2012 11 | | 2012 11 2021 7 | | | 2021 7 | | | | |