55% (1972)

10% (1978)

0% (1982)

0% (1973)

25% (1988)

65% (1971)

39% (1974)

70% (1984)

60% (1974)

0% (1972)

0% (1975)

50% (1986)

62% (1973)

80% (1985)

64% (1974)

10% (1972)

60% (1975)

50% (1972)

75% (1984)

0% (1967)