Bi-annual	US dollars
1987-06-30	24
1987-12-31	25
1988-06-30	24
1988-12-31	22
1989-06-30	20
1989-12-31	10
1990-06-30	12
1990-12-31	19
1991-06-30	8
1991-12-31	9
1992-06-30	4
1992-12-31	5
1993-06-30	3
1993-12-31	4
1994-06-30	2
1994-12-31	6
1995-06-30	0
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	0
1998-06-30	2
1998-12-31	0
1999-06-30	0