| | | | | | | | | | | | | | | | | | — | | | | | | | | | | | | | | | | 1950 | 1975 | | | | | | | | | | | | | | | | | | | | | | | | | 1980 9 | | | | | | 1984 6 | | 1988 | | | | | | 80 500 | | | | | | | | | 2010 10 | | | | | | | | | | | | 48 | | | | | | 23 | | | | | | | | | | | — | | | | | | | | | | | | | | | |