Bi-annual	US dollars
1987-06-30	2
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	5
1993-12-31	6
1994-06-30	0
1994-12-31	307
1995-06-30	259
1995-12-31	260
1996-06-30	415
1996-12-31	211
1997-06-30	148
1997-12-31	158
1998-06-30	207
1998-12-31	166
1999-06-30	158