Bi-annual	US dollars
1987-06-30	8
1987-12-31	13
1988-06-30	10
1988-12-31	14
1989-06-30	16
1989-12-31	35
1990-06-30	42
1990-12-31	48
1991-06-30	21
1991-12-31	7
1992-06-30	4
1992-12-31	23
1993-06-30	5
1993-12-31	15
1994-06-30	5
1994-12-31	8
1995-06-30	8
1995-12-31	6
1996-06-30	5
1996-12-31	3
1997-06-30	38
1997-12-31	12
1998-06-30	22
1998-12-31	8
1999-06-30	0