35% (1989)

0% (1979)

54% (1984)

20% (1981)

53% (1983)

59% (1989)

52% (1986)

8% (1979)

65% (1980)

60% (1980)

51% (1978)

10% (1973)

50% (1981)

62% (1987)

48% (1976)

64% (1981)

43% (1984)

67% (1980)

0% (1983)

59% (1985)