80% (1999)

68% (2003)

75% (2009)

77% (2002)

58% (2009)

66% (2008)

61% (2005)

61% (2005)

64% (2008)

62% (2010)

77% (2005)

55% (2008)

69% (2010)

72% (2012)

56% (2007)

64% (2000)

71% (2003)

62% (2002)

72% (2009)

67% (2005)