Bi-annual	US dollars
1987-06-30	37
1987-12-31	13
1988-06-30	41
1988-12-31	7
1989-06-30	76
1989-12-31	52
1990-06-30	98
1990-12-31	44
1991-06-30	73
1991-12-31	106
1992-06-30	169
1992-12-31	103
1993-06-30	77
1993-12-31	146
1994-06-30	51
1994-12-31	94
1995-06-30	70
1995-12-31	111
1996-06-30	25
1996-12-31	48
1997-06-30	48
1997-12-31	48
1998-06-30	138
1998-12-31	163
1999-06-30	43