68% (2018)

45% (1970)

44% (2004)

67% (2016)

74% (1999)

83% (2008)

32% (1998)

72% (2013)

59% (2001)

88% (2014)

72% (2010)

80% (1991)

83% (1993)

77% (2006)

58% (1976)

79% (1987)

80% (2009)

80% (2004)

65% (2001)

74% (2003)