47% (1995)

70% (1994)

52% (1994)

57% (1993)

53% (1995)

50% (1991)

67% (1991)

46% (1989)

50% (1994)

44% (1990)

50% (1991)

38% (1994)

49% (1994)

50% (1994)

40% (1992)

53% (1996)

65% (1996)

43% (1991)

10% (1993)

70% (1990)