70% (1985)

73% (1980)

54% (1971)

77% (1981)

23% (1986)

50% (1983)

0% (1984)

60% (1979)

0% (1986)

59% (1978)

60% (1980)

90% (1971)

0% (1973)

40% (1982)

0% (1972)

40% (1975)

0% (1972)

0% (1991)

0% (1976)

0% (1978)