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	0
1992-12-31	0
1993-06-30	0
1993-12-31	269
1994-06-30	171
1994-12-31	97
1995-06-30	188
1995-12-31	121
1996-06-30	155
1996-12-31	238
1997-06-30	176
1997-12-31	559
1998-06-30	599
1998-12-31	591
1999-06-30	615