68% (2004)

62% (2000)

68% (2015)

72% (2015)

57% (2011)

57% (2003)

70% (2014)

68% (1998)

73% (2014)

60% (2008)

63% (2000)

58% (2009)

63% (2001)

56% (2013)

67% (2012)

74% (2003)

65% (2003)

66% (2009)

53% (2012)

52% (2007)