75% (1996)

82% (2005)

69% (2012)

84% (2009)

100% (1965)

50% (1997)

74% (1971)

64% (1981)

77% (1982)

77% (1984)

71% (1998)

73% (1987)

64% (1997)

76% (2006)

79% (2007)

76% (2001)

64% (2003)

40% (2002)

68% (1980)

60% (1984)