Bi-annual	US dollars
1987-06-30	10
1987-12-31	4
1988-06-30	2
1988-12-31	114
1989-06-30	93
1989-12-31	90
1990-06-30	192
1990-12-31	6
1991-06-30	2
1991-12-31	106
1992-06-30	2
1992-12-31	0
1993-06-30	0
1993-12-31	0
1994-06-30	28
1994-12-31	27
1995-06-30	25
1995-12-31	36
1996-06-30	73
1996-12-31	75
1997-06-30	12
1997-12-31	15
1998-06-30	42
1998-12-31	128
1999-06-30	61