Bi-annual	US dollars
1987-06-30	27
1987-12-31	21
1988-06-30	19
1988-12-31	27
1989-06-30	11
1989-12-31	15
1990-06-30	44
1990-12-31	12
1991-06-30	6
1991-12-31	2
1992-06-30	4
1992-12-31	0
1993-06-30	2
1993-12-31	0
1994-06-30	2
1994-12-31	-5
1995-06-30	0
1995-12-31	0
1996-06-30	2
1996-12-31	3
1997-06-30	0
1997-12-31	5
1998-06-30	0
1998-12-31	2
1999-06-30	0