79% (2004)

51% (1997)

55% (1999)

69% (2008)

68% (2009)

68% (1996)

73% (1998)

60% (2006)

65% (1997)

64% (2012)

64% (2017)

37% (1998)

62% (2016)

63% (2012)

55% (2007)

74% (2014)

69% (2010)

47% (2005)

58% (2013)

57% (2016)