82% (1994)

67% (1986)

70% (1971)

65% (1981)

60% (1980)

0% (1980)

0% (1986)

0% (1974)

0% (1989)

0% (1969)

0% (1982)

0% (1979)

0% (1979)

0% (1977)

100% (1973)

70% (1986)

0% (1985)

90% (1985)

0% (1983)

40% (1976)