Bi-annual	US dollars
1987-06-30	52
1987-12-31	32
1988-06-30	38
1988-12-31	36
1989-06-30	29
1989-12-31	29
1990-06-30	30
1990-12-31	31
1991-06-30	21
1991-12-31	19
1992-06-30	10
1992-12-31	11
1993-06-30	11
1993-12-31	19
1994-06-30	8
1994-12-31	8
1995-06-30	6
1995-12-31	8
1996-06-30	14
1996-12-31	33
1997-06-30	35
1997-12-31	44
1998-06-30	38
1998-12-31	27
1999-06-30	33