Bi-annual	US dollars
1987-06-30	324
1987-12-31	177
1988-06-30	101
1988-12-31	172
1989-06-30	177
1989-12-31	776
1990-06-30	863
1990-12-31	866
1991-06-30	923
1991-12-31	693
1992-06-30	799
1992-12-31	598
1993-06-30	495
1993-12-31	542
1994-06-30	545
1994-12-31	701
1995-06-30	640
1995-12-31	575
1996-06-30	536
1996-12-31	277
1997-06-30	135
1997-12-31	574
1998-06-30	457
1998-12-31	508
1999-06-30	237