59% (1983)

80% (1981)

73% (1987)

47% (1981)

60% (1988)

65% (1981)

30% (1969)

53% (1973)

70% (1988)

59% (1976)

0% (1969)

49% (1972)

62% (1970)

72% (1979)

51% (1983)

36% (1989)

0% (1985)

70% (1981)

45% (1980)

0% (1970)