43% (1994)

57% (1990)

45% (1985)

31% (1985)

54% (1995)

47% (1987)

42% (1996)

41% (1994)

54% (1990)

53% (1997)

35% (1996)

39% (1988)

42% (1990)

41% (1985)

36% (1996)

39% (1994)

10% (1990)

78% (1995)

20% (1995)