75% (1973)

70% (1967)

64% (1976)

64% (1956)

50% (1955)

0% (1959)

70% (1958)

20% (1979)

69% (1963)

70% (1954)

43% (1961)

10% (1972)

60% (1958)

0% (1976)

55% (1955)

62% (1971)

45% (1959)

50% (1959)

70% (1960)

48% (1974)