63% (1960)

45% (1985)

51% (1963)

56% (1963)

35% (1961)

44% (1960)

38% (1958)

40% (1965)

72% (1962)

42% (1959)

33% (1968)

45% (1957)

45% (1960)

49% (1977)

40% (1956)

31% (1961)

44% (1957)