Bi-annual	US dollars
1987-06-30	2
1987-12-31	9
1988-06-30	5
1988-12-31	14
1989-06-30	11
1989-12-31	3
1990-06-30	5
1990-12-31	6
1991-06-30	2
1991-12-31	2
1992-06-30	2
1992-12-31	3
1993-06-30	0
1993-12-31	0
1994-06-30	2
1994-12-31	2
1995-06-30	16
1995-12-31	3
1996-06-30	8
1996-12-31	5
1997-06-30	10
1997-12-31	12
1998-06-30	18
1998-12-31	23
1999-06-30	52