62% (1983)

49% (1988)

60% (1984)

45% (1988)

60% (1980)

49% (1991)

47% (1985)

55% (1984)

47% (1982)

50% (1987)

40% (1988)

53% (1979)

15% (1988)

42% (1987)

52% (1987)

65% (1986)

55% (1986)

63% (1987)

42% (1986)

37% (1987)