Bi-annual	US dollars
1987-06-30	0
1987-12-31	4
1988-06-30	5
1988-12-31	7
1989-06-30	6
1989-12-31	5
1990-06-30	5
1990-12-31	6
1991-06-30	5
1991-12-31	6
1992-06-30	8
1992-12-31	18
1993-06-30	14
1993-12-31	21
1994-06-30	57
1994-12-31	41
1995-06-30	38
1995-12-31	37
1996-06-30	59
1996-12-31	125
1997-06-30	38
1997-12-31	31
1998-06-30	68
1998-12-31	98
1999-06-30	69