Bi-annual	US dollars
1987-06-30	632
1987-12-31	549
1988-06-30	1410
1988-12-31	1331
1989-06-30	643
1989-12-31	1135
1990-06-30	569
1990-12-31	783
1991-06-30	644
1991-12-31	133
1992-06-30	327
1992-12-31	317
1993-06-30	432
1993-12-31	389
1994-06-30	559
1994-12-31	31
1995-06-30	49
1995-12-31	105
1996-06-30	81
1996-12-31	72
1997-06-30	68
1997-12-31	43
1998-06-30	373
1998-12-31	102
1999-06-30	104