Bi-annual	US dollars
1987-06-30	106
1987-12-31	21
1988-06-30	85
1988-12-31	61
1989-06-30	149
1989-12-31	155
1990-06-30	92
1990-12-31	85
1991-06-30	57
1991-12-31	127
1992-06-30	82
1992-12-31	91
1993-06-30	155
1993-12-31	398
1994-06-30	364
1994-12-31	501
1995-06-30	452
1995-12-31	541
1996-06-30	519
1996-12-31	664
1997-06-30	780
1997-12-31	433
1998-06-30	218
1998-12-31	173
1999-06-30	161