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	80
1994-06-30	37
1994-12-31	232
1995-06-30	142
1995-12-31	313
1996-06-30	154
1996-12-31	529
1997-06-30	544
1997-12-31	660
1998-06-30	257
1998-12-31	245
1999-06-30	181