Bi-annual	US dollars
1987-06-30	0
1987-12-31	0
1988-06-30	0
1988-12-31	0
1989-06-30	0
1989-12-31	0
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	0
1992-12-31	0
1993-06-30	0
1993-12-31	74
1994-06-30	20
1994-12-31	50
1995-06-30	107
1995-12-31	130
1996-06-30	109
1996-12-31	496
1997-06-30	517
1997-12-31	181
1998-06-30	193
1998-12-31	240
1999-06-30	178