20% (1979)

47% (1975)

61% (1973)

60% (1974)

0% (1974)

63% (1974)

62% (1978)

0% (1975)

0% (1986)

70% (1984)

70% (1974)

60% (1985)

58% (1974)

56% (1976)

58% (1973)

0% (1973)

71% (1976)

0% (1967)

60% (1973)

40% (1978)