Bi-annual	US dollars
1987-06-30	52
1987-12-31	42
1988-06-30	29
1988-12-31	58
1989-06-30	47
1989-12-31	18
1990-06-30	35
1990-12-31	44
1991-06-30	31
1991-12-31	45
1992-06-30	32
1992-12-31	79
1993-06-30	83
1993-12-31	49
1994-06-30	76
1994-12-31	97
1995-06-30	29
1995-12-31	31
1996-06-30	40
1996-12-31	39
1997-06-30	15
1997-12-31	8
1998-06-30	10
1998-12-31	3
1999-06-30	2