Bi-annual	US dollars
1987-06-30	316
1987-12-31	370
1988-06-30	374
1988-12-31	401
1989-06-30	177
1989-12-31	406
1990-06-30	389
1990-12-31	417
1991-06-30	118
1991-12-31	112
1992-06-30	114
1992-12-31	79
1993-06-30	77
1993-12-31	281
1994-06-30	335
1994-12-31	238
1995-06-30	248
1995-12-31	324
1996-06-30	483
1996-12-31	543
1997-06-30	517
1997-12-31	564
1998-06-30	779
1998-12-31	677
1999-06-30	705