70% (1985)

52% (1984)

70% (1983)

75% (1962)

20% (1990)

55% (1987)

90% (1987)

80% (1983)

63% (1977)

80% (1980)

80% (1984)

60% (1980)

90% (1984)

93% (1990)

80% (1973)

28% (1977)

80% (1977)

80% (1972)

60% (1969)

90% (1986)