| | | | | | 1960 1 | | 1985 11 1976 | 8 | 1976 8 1979 4 | | 1979 4 1980 8 | | 1980 8 1984 7 | | | 1984 7 1987 12 | | 1987 12 1990 1 | | | 1990 1 1991 6 | | | 1991 6 1997 12 | | 1997 12 2000 6 | | | 2000 6 2002 10 | | | 2002 10 2008 5 | | 2008 5 2011 4 | | 2011 4 2015 11 | | 2015 11 2016 5 | | | | 2016 5 2020 3 | | | | 2020 3 | |