62% (1985)

46% (1986)

52% (1970)

60% (1963)

80% (1977)

60% (1980)

90% (1976)

44% (1987)

0% (1983)

70% (1963)

47% (1972)

70% (1977)

55% (1986)

72% (1991)

64% (1981)

0% (1962)

70% (1961)

60% (1977)

45% (1978)

50% (1987)