Bi-annual	US dollars
1987-06-30	52
1987-12-31	21
1988-06-30	10
1988-12-31	24
1989-06-30	16
1989-12-31	16
1990-06-30	38
1990-12-31	33
1991-06-30	19
1991-12-31	200
1992-06-30	200
1992-12-31	124
1993-06-30	152
1993-12-31	83
1994-06-30	69
1994-12-31	61
1995-06-30	91
1995-12-31	79
1996-06-30	117
1996-12-31	36
1997-06-30	40
1997-12-31	46
1998-06-30	118
1998-12-31	220
1999-06-30	167