61% (1978)

48% (1957)

32% (1959)

0% (1963)

51% (1958)

49% (1966)

53% (1961)

65% (1975)

57% (1961)

43% (1958)

47% (1962)

53% (1963)

58% (1976)

57% (1959)

47% (1955)

56% (1964)

56% (1965)

35% (1974)

67% (1973)

40% (1965)