65% (1973)

55% (1986)

67% (1960)

61% (1962)

69% (1977)

63% (1969)

49% (1989)

63% (1979)

42% (1971)

58% (1971)

74% (1966)

64% (1973)

57% (1984)

0% (1983)

53% (1981)

0% (1968)

48% (1988)

70% (1980)

66% (1987)

71% (1987)