68% (2015)

72% (2015)

68% (2004)

70% (2014)

57% (2011)

60% (2008)

72% (2014)

68% (1998)

56% (2013)

61% (2000)

63% (2000)

57% (2003)

67% (2012)

62% (2001)

58% (2009)

66% (2009)

52% (2007)

74% (2003)

53% (2012)

50% (2010)