73% (1973)

40% (1960)

69% (1963)

61% (1994)

71% (1962)

70% (1981)

70% (1986)

63% (1977)

63% (1975)

67% (1972)

61% (1973)

67% (1964)

62% (1961)

69% (1978)

62% (1972)

65% (1962)

62% (1978)

61% (1966)

69% (1965)

64% (1963)