60% (1983)

60% (1981)

0% (1977)

45% (1985)

73% (1987)

57% (1984)

47% (1981)

60% (1984)

47% (1975)

36% (1989)

60% (1984)

45% (1980)

60% (1980)

80% (1985)

59% (1983)

53% (1973)

0% (1988)

60% (1986)

70% (1983)

49% (1972)