Bi-annual	US dollars
1987-06-30	11
1987-12-31	11
1988-06-30	9
1988-12-31	5
1989-06-30	9
1989-12-31	11
1990-06-30	12
1990-12-31	6
1991-06-30	3
1991-12-31	7
1992-06-30	13
1992-12-31	-117
1993-06-30	-83
1993-12-31	16
1994-06-30	46
1994-12-31	42
1995-06-30	11
1995-12-31	17
1996-06-30	16
1996-12-31	15
1997-06-30	7
1997-12-31	41
1998-06-30	0
1998-12-31	0
1999-06-30	0