63% (1960)

56% (1963)

51% (1963)

42% (1959)

72% (1962)

32% (1968)

36% (1961)

45% (1985)

40% (1965)

40% (1956)

49% (1977)

45% (1960)

44% (1960)

45% (1957)

44% (1957)

37% (1958)

31% (1961)