56% (1971)

66% (1968)

62% (1979)

53% (1979)

63% (1982)

63% (1981)

0% (1987)

65% (1987)

50% (1972)

64% (1964)

75% (1965)

50% (1986)

71% (1975)

53% (1978)

55% (1980)

48% (1988)

50% (1973)

81% (1978)

62% (1964)

63% (1967)