47% (1995)

67% (1991)

53% (1995)

58% (1993)

50% (1991)

40% (1992)

44% (1990)

65% (1996)

49% (1994)

60% (1992)

52% (1994)

38% (1994)

40% (1994)

50% (1993)

62% (1989)

38% (1992)

50% (1995)

53% (1996)

37% (1991)

70% (1994)