Bi-annual	US dollars
1987-06-30	48
1987-12-31	55
1988-06-30	68
1988-12-31	56
1989-06-30	64
1989-12-31	68
1990-06-30	75
1990-12-31	58
1991-06-30	42
1991-12-31	52
1992-06-30	49
1992-12-31	58
1993-06-30	62
1993-12-31	12
1994-06-30	8
1994-12-31	3
1995-06-30	2
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	5
1997-12-31	2
1998-06-30	0
1998-12-31	0
1999-06-30	0