Bi-annual	US dollars
1987-06-30	40
1987-12-31	26
1988-06-30	73
1988-12-31	78
1989-06-30	28
1989-12-31	27
1990-06-30	138
1990-12-31	58
1991-06-30	91
1991-12-31	52
1992-06-30	112
1992-12-31	91
1993-06-30	62
1993-12-31	106
1994-06-30	93
1994-12-31	78
1995-06-30	83
1995-12-31	65
1996-06-30	131
1996-12-31	156
1997-06-30	65
1997-12-31	82
1998-06-30	77
1998-12-31	60
1999-06-30	57