Bi-annual	US dollars
1987-06-30	60
1987-12-31	53
1988-06-30	61
1988-12-31	52
1989-06-30	48
1989-12-31	31
1990-06-30	28
1990-12-31	81
1991-06-30	42
1991-12-31	97
1992-06-30	70
1992-12-31	112
1993-06-30	117
1993-12-31	108
1994-06-30	96
1994-12-31	84
1995-06-30	70
1995-12-31	65
1996-06-30	40
1996-12-31	7
1997-06-30	60
1997-12-31	44
1998-06-30	65
1998-12-31	83
1999-06-30	123