77% (1961)

66% (2013)

30% (1978)

68% (1990)

61% (1990)

63% (1993)

68% (1975)

62% (1976)

80% (1958)

64% (1958)

70% (2005)

80% (1943)

72% (1986)

74% (1963)

70% (1937)

56% (1988)

60% (1977)

70% (1964)

66% (1986)

77% (1942)