73% (1984)

58% (1985)

54% (1989)

59% (1988)

65% (1986)

67% (1987)

48% (1995)

57% (1988)

51% (1991)

74% (1994)

41% (1999)

54% (1995)

56% (1985)

62% (1985)

32% (1994)

48% (1988)

0% (1991)

41% (1991)

38% (1985)

50% (1988)