73% (1984)

58% (1985)

59% (1988)

65% (1986)

54% (1989)

67% (1987)

62% (1985)

57% (1988)

54% (1995)

41% (1985)

51% (1991)

42% (1991)

48% (1988)

55% (1985)

41% (1999)

65% (1981)

53% (1992)

59% (1984)

32% (1994)

42% (1986)