67% (1979)

63% (1979)

44% (1976)

65% (1963)

56% (1971)

56% (1977)

58% (1973)

62% (1978)

51% (1969)

51% (1979)

50% (1960)

59% (1976)

30% (1969)

66% (1964)

67% (1963)

63% (1974)

67% (1973)

49% (1977)

49% (1976)

59% (1979)