75% (1953)

78% (1975)

68% (1976)

67% (1969)

73% (1953)

73% (1955)

74% (1969)

70% (1973)

79% (1975)

72% (1965)

77% (1952)

55% (1957)

73% (1965)

82% (1975)

62% (1972)

62% (1958)

66% (1971)

73% (2008)

63% (1965)

54% (1972)