84% (2004)

81% (1988)

83% (1997)

79% (1989)

80% (1984)

80% (1986)

78% (1992)

80% (1995)

72% (2002)

78% (1985)

65% (1993)

74% (1991)

71% (1999)

75% (2007)

0% (1994)

68% (2013)

73% (1993)

77% (2000)

60% (1989)

62% (1992)