43% (1994)

54% (1995)

58% (1990)

43% (1990)

46% (1985)

54% (1990)

48% (1987)

45% (1985)

31% (1985)

39% (1994)

42% (1996)

48% (1997)

36% (1996)

43% (1988)

74% (1995)

35% (1996)

15% (1995)

41% (1994)

10% (1990)