Bi-annual	US dollars
1987-06-30	47
1987-12-31	30
1988-06-30	32
1988-12-31	38
1989-06-30	50
1989-12-31	52
1990-06-30	30
1990-12-31	41
1991-06-30	44
1991-12-31	56
1992-06-30	61
1992-12-31	71
1993-06-30	105
1993-12-31	74
1994-06-30	119
1994-12-31	158
1995-06-30	95
1995-12-31	76
1996-06-30	712
1996-12-31	659
1997-06-30	594
1997-12-31	556
1998-06-30	452
1998-12-31	419
1999-06-30	244