61% (2009)

65% (2015)

78% (1998)

57% (2013)

56% (2004)

62% (2003)

62% (2009)

64% (2014)

55% (2003)

70% (1999)

68% (2004)

66% (2005)

68% (2008)

65% (2015)

59% (2005)

69% (2016)

58% (2006)

53% (2012)

72% (2010)

49% (2007)