50% (1962)

60% (1972)

71% (1970)

54% (1986)

0% (1987)

58% (1968)

0% (1970)

0% (1973)

78% (1988)

62% (1972)

50% (1969)

0% (1972)

0% (1974)

55% (1975)

0% (1968)

52% (1972)

79% (1981)

0% (1979)

0% (1975)

50% (1964)