| | | | | | 1957 3 | | 1975 8 1992 6 | | 1975 8 1978 8 | | 1978 8 1982 8 | | 1982 8 1988 12 | | 1988 12 1996 4 | | 1996 4 1996 9 | | 1996 9 2004 4 | | 2004 4 2006 3 | | 2006 3 2009 1 | | 2009 1 2011 12 | | 2011 12 2017 7 | | 2017 7 | |