Bi-annual	US dollars
1987-06-30	5
1987-12-31	13
1988-06-30	5
1988-12-31	7
1989-06-30	3
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	8
1993-12-31	15
1994-06-30	31
1994-12-31	55
1995-06-30	64
1995-12-31	53
1996-06-30	81
1996-12-31	82
1997-06-30	171
1997-12-31	240
1998-06-30	150
1998-12-31	153
1999-06-30	-214