76% (1964)

62% (1980)

68% (1975)

72% (2007)

86% (2013)

60% (1962)

83% (2015)

79% (2003)

70% (2004)

68% (2004)

79% (1978)

53% (2002)

75% (2002)

64% (2006)

70% (1974)

38% (1965)

55% (1994)

68% (1992)

50% (2010)

81% (1988)