84% (2004)

81% (1988)

84% (1997)

78% (1989)

80% (1986)

80% (1984)

79% (1995)

78% (1992)

50% (2014)

72% (2002)

64% (1993)

74% (1991)

71% (1999)

78% (1985)

73% (1993)

69% (1985)

76% (2000)

67% (2013)

49% (1987)

62% (1986)