71% (1975)

50% (1964)

61% (1968)

59% (1993)

71% (1975)

58% (1962)

58% (1972)

54% (1972)

74% (1977)

73% (1994)

64% (1985)

69% (2002)

64% (1991)

62% (1987)

74% (2014)

67% (1972)

37% (1959)

70% (1992)

67% (1979)

34% (1999)