85% (1966)

66% (1987)

64% (1997)

64% (1989)

62% (1985)

86% (1957)

73% (1976)

84% (1975)

69% (1995)

70% (1962)

65% (2001)

71% (1963)

63% (1999)

62% (2003)

83% (1979)

65% (1974)

73% (1964)

83% (1957)

66% (1967)

68% (1988)