50% (2000)

48% (1988)

0% (1997)

0% (1996)

73% (1988)

38% (1990)

0% (1990)

50% (1998)

74% (1988)

49% (1996)

53% (1987)

42% (1996)

44% (1987)

55% (1991)

65% (1996)

62% (1994)

58% (1995)

60% (1994)

72% (1989)

55% (1995)