Bi-annual	US dollars
1987-06-30	21
1987-12-31	0
1988-06-30	15
1988-12-31	24
1989-06-30	2
1989-12-31	0
1990-06-30	7
1990-12-31	2
1991-06-30	0
1991-12-31	0
1992-06-30	2
1992-12-31	18
1993-06-30	11
1993-12-31	21
1994-06-30	9
1994-12-31	0
1995-06-30	27
1995-12-31	34
1996-06-30	54
1996-12-31	346
1997-06-30	324
1997-12-31	3
1998-06-30	3
1998-12-31	165
1999-06-30	216