Bi-annual	US dollars
1987-06-30	0
1987-12-31	0
1988-06-30	0
1988-12-31	0
1989-06-30	25
1989-12-31	0
1990-06-30	0
1990-12-31	585
1991-06-30	663
1991-12-31	960
1992-06-30	991
1992-12-31	912
1993-06-30	578
1993-12-31	474
1994-06-30	417
1994-12-31	322
1995-06-30	251
1995-12-31	250
1996-06-30	124
1996-12-31	98
1997-06-30	91
1997-12-31	102
1998-06-30	225
1998-12-31	138
1999-06-30	148