Bi-annual	US dollars
1987-06-30	76
1987-12-31	23
1988-06-30	73
1988-12-31	25
1989-06-30	31
1989-12-31	68
1990-06-30	89
1990-12-31	44
1991-06-30	42
1991-12-31	101
1992-06-30	65
1992-12-31	47
1993-06-30	137
1993-12-31	183
1994-06-30	221
1994-12-31	128
1995-06-30	86
1995-12-31	107
1996-06-30	461
1996-12-31	452
1997-06-30	70
1997-12-31	79
1998-06-30	42
1998-12-31	87
1999-06-30	43