68% (2003)

58% (2009)

80% (1999)

75% (2009)

66% (2008)

77% (2002)

72% (2009)

69% (2010)

73% (2012)

61% (2005)

56% (2007)

65% (2008)

59% (2008)

77% (2005)

62% (2010)

67% (2005)

62% (2005)

55% (2008)

56% (2007)

65% (2000)