Bi-annual	US dollars
1987-06-30	58
1987-12-31	87
1988-06-30	78
1988-12-31	76
1989-06-30	56
1989-12-31	53
1990-06-30	56
1990-12-31	64
1991-06-30	70
1991-12-31	84
1992-06-30	76
1992-12-31	88
1993-06-30	77
1993-12-31	72
1994-06-30	94
1994-12-31	69
1995-06-30	41
1995-12-31	113
1996-06-30	57
1996-12-31	68
1997-06-30	85
1997-12-31	74
1998-06-30	127
1998-12-31	92
1999-06-30	99