80% (1968)

60% (1963)

50% (1979)

0% (1985)

0% (1986)

0% (1962)

80% (1987)

0% (1970)

0% (1971)

60% (1981)

80% (1961)

0% (1966)

0% (1953)

80% (1958)

62% (1986)

0% (1990)

60% (1988)

0% (1966)

0% (1980)

0% (1960)