Bi-annual	US dollars
1987-06-30	95
1987-12-31	96
1988-06-30	60
1988-12-31	58
1989-06-30	64
1989-12-31	81
1990-06-30	37
1990-12-31	33
1991-06-30	50
1991-12-31	73
1992-06-30	49
1992-12-31	35
1993-06-30	39
1993-12-31	65
1994-06-30	63
1994-12-31	53
1995-06-30	41
1995-12-31	36
1996-06-30	3
1996-12-31	3
1997-06-30	0
1997-12-31	5
1998-06-30	0
1998-12-31	-3
1999-06-30	0