69% (2015)

78% (2002)

66% (2011)

61% (2001)

74% (2014)

47% (2004)

72% (2012)

66% (2005)

59% (2017)

63% (1999)

68% (1998)

73% (1994)

65% (2003)

63% (2003)

64% (2008)

56% (2007)

63% (2008)

62% (2004)

63% (2008)

65% (2010)