77% (1986)

69% (1989)

59% (1986)

59% (1986)

69% (1987)

51% (1986)

56% (1988)

64% (1988)

60% (1987)

67% (1987)

64% (1987)

52% (1986)

61% (1986)

55% (1987)

60% (1986)

42% (1988)

54% (1987)

59% (1987)

42% (1989)

61% (1988)