Bi-annual	US dollars
1987-06-30	23
1987-12-31	119
1988-06-30	26
1988-12-31	34
1989-06-30	42
1989-12-31	39
1990-06-30	38
1990-12-31	42
1991-06-30	42
1991-12-31	47
1992-06-30	46
1992-12-31	1100
1993-06-30	30
1993-12-31	25
1994-06-30	35
1994-12-31	52
1995-06-30	49
1995-12-31	54
1996-06-30	70
1996-12-31	63
1997-06-30	83
1997-12-31	122
1998-06-30	38
1998-12-31	43
1999-06-30	57