Bi-annual	US dollars
1987-06-30	16
1987-12-31	0
1988-06-30	188
1988-12-31	231
1989-06-30	0
1989-12-31	198
1990-06-30	218
1990-12-31	164
1991-06-30	222
1991-12-31	293
1992-06-30	257
1992-12-31	159
1993-06-30	83
1993-12-31	0
1994-06-30	35
1994-12-31	142
1995-06-30	200
1995-12-31	242
1996-06-30	188
1996-12-31	53
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	5
1999-06-30	11