32% (1976)

65% (1951)

60% (1965)

37% (1973)

47% (1958)

67% (1962)

50% (1953)

63% (1969)

69% (1968)

0% (1955)

0% (1960)

40% (1953)

23% (1952)

40% (1971)

54% (1969)

67% (1956)

0% (1961)

52% (1955)

40% (1959)

64% (1970)