87% (1994)

86% (1999)

67% (2004)

80% (1995)

67% (2011)

74% (1989)

67% (2007)

73% (2007)

78% (1990)

55% (1996)

66% (2000)

64% (2010)

79% (2004)

67% (1997)

58% (2005)

61% (1995)

57% (2003)

65% (1991)

66% (1995)

76% (2013)