Bi-annual	US dollars
1987-06-30	6
1987-12-31	9
1988-06-30	20
1988-12-31	5
1989-06-30	23
1989-12-31	13
1990-06-30	9
1990-12-31	6
1991-06-30	2
1991-12-31	0
1992-06-30	40
1992-12-31	27
1993-06-30	12
1993-12-31	38
1994-06-30	32
1994-12-31	0
1995-06-30	0
1995-12-31	2
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	2
1998-06-30	0
1998-12-31	13
1999-06-30	8