57% (1991)

82% (1990)

75% (1992)

10% (1983)

57% (1985)

54% (1991)

51% (1984)

20% (1989)

80% (1983)

56% (1991)

56% (1992)

35% (1982)

0% (1982)

44% (1986)

44% (1988)

41% (1985)

56% (1993)

49% (1982)

62% (1991)

55% (1984)