47% (1995)

58% (1993)

67% (1991)

44% (1990)

70% (1994)

38% (1994)

65% (1996)

40% (1992)

53% (1995)

38% (1992)

30% (1991)

50% (1991)

50% (1994)

50% (1994)

35% (1994)

60% (1991)

41% (1989)

66% (1993)

39% (1994)

37% (1991)