Bi-annual	US dollars
1987-06-30	2
1987-12-31	4
1988-06-30	7
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	6
1992-12-31	0
1993-06-30	20
1993-12-31	37
1994-06-30	3
1994-12-31	55
1995-06-30	76
1995-12-31	25
1996-06-30	19
1996-12-31	41
1997-06-30	33
1997-12-31	16
1998-06-30	17
1998-12-31	12
1999-06-30	93