78% (1989)

84% (2004)

71% (2002)

78% (1992)

81% (1988)

83% (1997)

80% (1986)

79% (1995)

78% (1985)

74% (1991)

64% (1994)

82% (1993)

78% (1988)

73% (1993)

75% (2000)

72% (1985)

66% (2013)

50% (2014)

60% (1987)

63% (1986)