61% (1994)

73% (1973)

70% (1962)

69% (1963)

69% (1965)

64% (1975)

51% (1967)

66% (1964)

67% (1972)

73% (1982)

61% (1966)

71% (1986)

61% (1978)

56% (2004)

68% (1978)

63% (1977)

71% (1981)

65% (1985)

52% (2000)

63% (1968)