84% (2004)

81% (1988)

84% (1997)

79% (1989)

80% (1986)

64% (1994)

80% (1995)

72% (2002)

78% (1992)

74% (1991)

78% (1985)

74% (1993)

78% (1988)

76% (2000)

51% (1987)

50% (2014)

63% (2000)

66% (2013)

72% (1985)

63% (1986)