71% (2018)

45% (1970)

44% (2004)

74% (1999)

32% (1998)

83% (2008)

67% (2016)

58% (2001)

65% (2001)

80% (1991)

72% (2013)

59% (2015)

71% (2010)

58% (1976)

85% (1993)

88% (2014)

78% (1995)

75% (2003)

69% (2016)

80% (2009)