65% (1961)

82% (1967)

47% (1981)

50% (2010)

65% (1992)

79% (2001)

75% (1987)

50% (2013)

70% (1965)

0% (1989)

70% (1999)

79% (1976)

66% (1991)

46% (1988)

69% (2004)

71% (2004)

77% (2011)

70% (2009)

81% (1981)

76% (2015)