43% (1994)

57% (1990)

45% (1985)

47% (1987)

54% (1990)

41% (1994)

32% (1985)

42% (1990)

39% (1988)

54% (1995)

42% (1996)

39% (1994)

36% (1996)

35% (1996)

41% (1985)

74% (1995)

53% (1997)

20% (1995)

10% (1990)