68% (2014)

66% (2013)

65% (2011)

62% (2003)

73% (2013)

72% (2008)

72% (2011)

74% (2014)

64% (2006)

72% (2008)

50% (2011)

60% (2009)

42% (2004)

44% (2006)

68% (2005)

43% (2002)

38% (2001)

61% (2003)

61% (2010)

55% (2014)