63% (1960)

55% (1963)

51% (1963)

35% (1961)

72% (1962)

42% (1959)

40% (1965)

45% (1985)

33% (1968)

44% (1960)

49% (1977)

45% (1957)

31% (1961)

40% (1956)

37% (1958)

45% (1960)

44% (1957)