50% (1991)

0% (1976)

60% (1980)

0% (1977)

60% (1989)

0% (1989)

50% (1975)

0% (1979)

63% (1990)

0% (1975)

70% (1982)

80% (1967)

52% (1986)

0% (1988)

90% (1987)

0% (1983)

90% (1972)

0% (1981)

0% (1982)

67% (1982)