Bi-annual	US dollars
1987-06-30	98
1987-12-31	9
1988-06-30	44
1988-12-31	54
1989-06-30	26
1989-12-31	45
1990-06-30	98
1990-12-31	10
1991-06-30	3
1991-12-31	4
1992-06-30	2
1992-12-31	0
1993-06-30	0
1993-12-31	6
1994-06-30	0
1994-12-31	17
1995-06-30	10
1995-12-31	6
1996-06-30	6
1996-12-31	9
1997-06-30	2
1997-12-31	0
1998-06-30	20
1998-12-31	37
1999-06-30	44