68% (1962)

65% (1967)

63% (1966)

70% (1964)

68% (1965)

66% (1985)

64% (1972)

52% (1969)

76% (1999)

69% (1975)

62% (1973)

66% (1963)

71% (1974)

75% (2001)

68% (1971)

68% (1968)

62% (1967)

64% (1966)

75% (1983)

69% (1964)