73% (1986)

78% (1990)

74% (1989)

69% (1989)

64% (1991)

63% (1991)

64% (1990)

67% (1990)

56% (1990)

50% (1994)

46% (1991)

52% (1991)

61% (1987)

61% (1990)

0% (1987)

70% (1987)

90% (1991)

61% (1994)

70% (1987)

66% (1989)