Bi-annual	US dollars
1987-06-30	124
1987-12-31	28
1988-06-30	217
1988-12-31	42
1989-06-30	43
1989-12-31	95
1990-06-30	101
1990-12-31	110
1991-06-30	115
1991-12-31	64
1992-06-30	74
1992-12-31	61
1993-06-30	726
1993-12-31	495
1994-06-30	248
1994-12-31	543
1995-06-30	568
1995-12-31	574
1996-06-30	493
1996-12-31	541
1997-06-30	569
1997-12-31	1157
1998-06-30	519
1998-12-31	463
1999-06-30	322