73% (1973)

72% (1982)

70% (1962)

67% (1970)

62% (1972)

61% (1965)

56% (1962)

66% (1964)

77% (1991)

70% (1986)

70% (1981)

51% (1967)

56% (1961)

61% (1973)

63% (1975)

67% (1965)

61% (1994)

65% (1985)

68% (1963)

61% (1967)