88% (1994)

86% (1999)

67% (2011)

80% (1995)

68% (2004)

66% (2000)

79% (2004)

78% (1990)

75% (1989)

55% (1996)

73% (2007)

64% (2010)

64% (2002)

75% (2013)

58% (2005)

70% (1993)

57% (2003)

67% (2007)

68% (2007)

66% (1995)