47% (1995)

44% (1990)

58% (1993)

67% (1991)

38% (1994)

53% (1995)

43% (1994)

40% (1992)

35% (1994)

46% (1989)

50% (1991)

65% (1996)

60% (1992)

53% (1991)

50% (1993)

53% (1996)

52% (1994)

66% (1993)

40% (1994)

41% (1989)