20% (1970)

48% (1974)

50% (1960)

0% (1953)

90% (1955)

53% (1974)

50% (1955)

50% (1975)

70% (1953)

43% (1961)

70% (1960)

60% (1958)

40% (1956)

0% (1957)

45% (1959)

54% (1958)

40% (1962)

60% (1963)

20% (1971)

0% (1956)