79% (2018)

49% (2016)

65% (2004)

76% (2013)

73% (2017)

74% (2010)

67% (2008)

73% (2002)

67% (2004)

58% (2006)

71% (2004)

63% (2001)

66% (1991)

60% (2015)

68% (1993)

62% (1995)

57% (2004)

62% (2008)

61% (1998)

74% (2013)