44% (1994)

54% (1995)

57% (1990)

48% (1987)

41% (1985)

54% (1990)

39% (1994)

35% (1996)

10% (1990)

20% (1995)

74% (1995)

41% (1994)

42% (1996)

31% (1985)

36% (1996)

43% (1988)

45% (1985)

41% (1990)

53% (1997)