Bi-annual	US dollars
1987-06-30	114
1987-12-31	94
1988-06-30	92
1988-12-31	38
1989-06-30	23
1989-12-31	42
1990-06-30	38
1990-12-31	35
1991-06-30	88
1991-12-31	170
1992-06-30	177
1992-12-31	64
1993-06-30	134
1993-12-31	108
1994-06-30	111
1994-12-31	99
1995-06-30	108
1995-12-31	171
1996-06-30	182
1996-12-31	229
1997-06-30	241
1997-12-31	90
1998-06-30	287
1998-12-31	416
1999-06-30	476