Bi-annual	US dollars
1987-06-30	435
1987-12-31	426
1988-06-30	513
1988-12-31	89
1989-06-30	124
1989-12-31	335
1990-06-30	178
1990-12-31	151
1991-06-30	143
1991-12-31	153
1992-06-30	177
1992-12-31	88
1993-06-30	65
1993-12-31	167
1994-06-30	148
1994-12-31	271
1995-06-30	212
1995-12-31	113
1996-06-30	67
1996-12-31	113
1997-06-30	251
1997-12-31	166
1998-06-30	112
1998-12-31	794
1999-06-30	210