Bi-annual	US dollars
1987-06-30	24
1987-12-31	4
1988-06-30	2
1988-12-31	5
1989-06-30	3
1989-12-31	3
1990-06-30	26
1990-12-31	4
1991-06-30	18
1991-12-31	151
1992-06-30	55
1992-12-31	73
1993-06-30	38
1993-12-31	34
1994-06-30	96
1994-12-31	5
1995-06-30	2
1995-12-31	8
1996-06-30	5
1996-12-31	43
1997-06-30	52
1997-12-31	12
1998-06-30	12
1998-12-31	53
1999-06-30	9