68% (1990)

33% (1988)

55% (1987)

58% (1989)

53% (1988)

61% (1989)

59% (1988)

58% (1990)

48% (1987)

54% (1990)

62% (1988)

76% (1984)

48% (1988)

62% (1992)

51% (1987)

72% (1986)

41% (1994)

64% (1991)

17% (1988)

63% (1986)