Bi-annual	US dollars
1987-06-30	27
1987-12-31	47
1988-06-30	43
1988-12-31	43
1989-06-30	62
1989-12-31	105
1990-06-30	138
1990-12-31	44
1991-06-30	52
1991-12-31	15
1992-06-30	38
1992-12-31	132
1993-06-30	62
1993-12-31	58
1994-06-30	26
1994-12-31	50
1995-06-30	105
1995-12-31	71
1996-06-30	64
1996-12-31	31
1997-06-30	47
1997-12-31	79
1998-06-30	100
1998-12-31	58
1999-06-30	80