50% (2000)

68% (1993)

63% (1998)

63% (1989)

62% (1994)

53% (1995)

70% (1994)

49% (1996)

38% (1992)

61% (1989)

55% (1995)

83% (1989)

80% (1987)

0% (1988)

57% (1987)

0% (1993)

70% (1995)

66% (1987)

45% (1995)

75% (1990)