63% (2006)

74% (1977)

69% (2002)

80% (1963)

66% (1989)

70% (2011)

72% (1991)

64% (1994)

60% (1976)

54% (1965)

65% (1992)

74% (1985)

75% (1979)

75% (2015)

73% (1991)

51% (1965)

69% (1989)

77% (1986)

70% (2009)

79% (1985)