Bi-annual	US dollars
1987-06-30	52
1987-12-31	6
1988-06-30	10
1988-12-31	9
1989-06-30	8
1989-12-31	11
1990-06-30	10
1990-12-31	17
1991-06-30	21
1991-12-31	9
1992-06-30	10
1992-12-31	-35
1993-06-30	114
1993-12-31	180
1994-06-30	222
1994-12-31	307
1995-06-30	320
1995-12-31	439
1996-06-30	555
1996-12-31	695
1997-06-30	586
1997-12-31	1122
1998-06-30	1422
1998-12-31	1691
1999-06-30	1465