68% (2004)

88% (1994)

86% (1999)

67% (2011)

80% (1995)

64% (2010)

66% (2000)

75% (1989)

73% (2007)

54% (2003)

55% (1996)

57% (2005)

78% (1990)

67% (2007)

62% (2000)

64% (1990)

79% (2004)

68% (2007)

65% (2007)

76% (2013)