68% (2003)

65% (2008)

77% (2002)

80% (1999)

74% (2009)

58% (2008)

58% (2009)

61% (2005)

55% (2008)

60% (2010)

67% (2005)

62% (2010)

65% (2000)

77% (2005)

65% (2008)

69% (2010)

75% (1999)

72% (2012)

56% (2007)

62% (2005)