75% (1973)

70% (1967)

0% (1959)

10% (1972)

45% (1956)

30% (1973)

64% (1976)

70% (1958)

40% (1970)

50% (1955)

50% (1960)

50% (1955)

20% (1971)

70% (1954)

62% (1956)

50% (1975)

53% (1974)

20% (1979)

20% (1970)

45% (1959)