Bi-annual	US dollars
1987-06-30	0
1987-12-31	0
1988-06-30	0
1988-12-31	0
1989-06-30	0
1989-12-31	0
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	10
1992-12-31	23
1993-06-30	23
1993-12-31	315
1994-06-30	193
1994-12-31	30
1995-06-30	0
1995-12-31	0
1996-06-30	8
1996-12-31	15
1997-06-30	30
1997-12-31	33
1998-06-30	33
1998-12-31	40
1999-06-30	24