Bi-annual	US dollars
1987-06-30	140
1987-12-31	74
1988-06-30	107
1988-12-31	76
1989-06-30	411
1989-12-31	148
1990-06-30	106
1990-12-31	46
1991-06-30	68
1991-12-31	35
1992-06-30	57
1992-12-31	59
1993-06-30	89
1993-12-31	44
1994-06-30	273
1994-12-31	311
1995-06-30	0
1995-12-31	0
1996-06-30	33
1996-12-31	0
1997-06-30	186
1997-12-31	20
1998-06-30	37
1998-12-31	0
1999-06-30	0