80% (1972)

60% (1975)

52% (1996)

84% (1967)

60% (1992)

50% (1988)

59% (1978)

0% (1983)

50% (1986)

0% (1980)

10% (1988)

90% (1987)

0% (1984)

50% (1989)

55% (1977)

0% (1980)

0% (1991)

0% (1977)

10% (1995)

80% (1977)