66% (2005)

77% (2008)

78% (2002)

70% (1997)

75% (2003)

70% (2009)

70% (2002)

65% (2001)

72% (2008)

64% (2006)

74% (2004)

69% (2007)

57% (2001)

59% (2000)

62% (2001)

65% (2003)

60% (2006)

54% (2005)

68% (2004)

69% (1996)