71% (1953)

79% (1975)

64% (1999)

70% (1966)

54% (1969)

65% (1966)

67% (1970)

73% (2001)

73% (1949)

73% (1962)

65% (1966)

51% (1956)

77% (1959)

69% (1963)

63% (1995)

68% (1997)

51% (1988)

45% (1995)

63% (1967)

59% (1970)