64% (1971)

18% (1972)

66% (1968)

60% (1973)

50% (1987)

93% (1977)

85% (1980)

20% (1976)

20% (1987)

0% (1988)

0% (1969)

0% (1967)

0% (1969)

44% (1980)

0% (1982)

50% (1986)

0% (1968)

0% (1973)

0% (1976)

10% (1990)