Bi-annual	US dollars
1987-06-30	119
1987-12-31	8
1988-06-30	27
1988-12-31	33
1989-06-30	42
1989-12-31	37
1990-06-30	42
1990-12-31	33
1991-06-30	60
1991-12-31	54
1992-06-30	116
1992-12-31	124
1993-06-30	144
1993-12-31	148
1994-06-30	202
1994-12-31	371
1995-06-30	323
1995-12-31	546
1996-06-30	469
1996-12-31	568
1997-06-30	519
1997-12-31	304
1998-06-30	622
1998-12-31	404
1999-06-30	535