56% (1975)

59% (1977)

54% (1976)

0% (1972)

43% (1976)

50% (1978)

50% (1973)

50% (1966)

35% (1964)

40% (1979)

0% (1979)

60% (1971)

44% (1974)

0% (1978)

0% (1970)