75% (1973)

71% (1967)

64% (1976)

62% (1971)

47% (1956)

62% (1956)

30% (1979)

51% (1955)

54% (1958)

50% (1960)

70% (1958)

10% (1972)

40% (1970)

55% (1969)

20% (1970)

45% (1959)

50% (1959)

70% (1954)

0% (1959)

43% (1961)