54% (1988)

33% (1988)

58% (1989)

67% (1990)

61% (1989)

55% (1990)

48% (1987)

63% (1986)

55% (1987)

58% (1990)

71% (1986)

42% (1987)

59% (1988)

64% (1993)

55% (1993)

63% (1992)

52% (1986)

46% (1988)

61% (1988)

51% (1987)