66% (1968)

83% (2011)

86% (1997)

68% (1993)

79% (2006)

87% (1996)

76% (2001)

52% (2000)

80% (1986)

84% (1957)

80% (2002)

75% (1997)

83% (2009)

66% (1992)

69% (2009)

51% (1998)

83% (2015)

77% (1987)

76% (2016)

67% (2010)