67% (2013)

61% (1956)

57% (1948)

60% (1957)

52% (1968)

59% (1961)

53% (2006)

38% (1971)

80% (1962)

68% (1965)

62% (1963)

60% (1962)

64% (1961)

76% (1951)

0% (1965)

55% (1960)

49% (1964)

38% (1965)

63% (1962)

54% (2009)