84% (2004)

81% (1988)

84% (1997)

79% (1989)

80% (1984)

80% (1986)

79% (1992)

80% (1995)

72% (2002)

64% (1993)

70% (1999)

78% (1985)

74% (1991)

60% (1987)

73% (1993)

77% (2000)

74% (2014)

61% (1986)

50% (2014)

67% (2013)