Bi-annual	US dollars
1987-06-30	119
1987-12-31	168
1988-06-30	198
1988-12-31	145
1989-06-30	243
1989-12-31	153
1990-06-30	159
1990-12-31	93
1991-06-30	148
1991-12-31	133
1992-06-30	114
1992-12-31	14
1993-06-30	24
1993-12-31	31
1994-06-30	0
1994-12-31	0
1995-06-30	0
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	0