Bi-annual	US dollars
1987-06-30	6
1987-12-31	47
1988-06-30	55
1988-12-31	5
1989-06-30	36
1989-12-31	55
1990-06-30	21
1990-12-31	8
1991-06-30	8
1991-12-31	19
1992-06-30	4
1992-12-31	12
1993-06-30	14
1993-12-31	15
1994-06-30	2
1994-12-31	8
1995-06-30	11
1995-12-31	8
1996-06-30	8
1996-12-31	36
1997-06-30	28
1997-12-31	25
1998-06-30	43
1998-12-31	42
1999-06-30	2