Bi-annual	US dollars
1987-06-30	37
1987-12-31	79
1988-06-30	39
1988-12-31	184
1989-06-30	198
1989-12-31	65
1990-06-30	119
1990-12-31	81
1991-06-30	60
1991-12-31	35
1992-06-30	57
1992-12-31	27
1993-06-30	21
1993-12-31	9
1994-06-30	2
1994-12-31	0
1995-06-30	0
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	0