Bi-annual	US dollars
1987-06-30	82
1987-12-31	100
1988-06-30	97
1988-12-31	67
1989-06-30	79
1989-12-31	124
1990-06-30	155
1990-12-31	100
1991-06-30	86
1991-12-31	149
1992-06-30	99
1992-12-31	61
1993-06-30	117
1993-12-31	152
1994-06-30	377
1994-12-31	171
1995-06-30	180
1995-12-31	191
1996-06-30	96
1996-12-31	111
1997-06-30	50
1997-12-31	92
1998-06-30	85
1998-12-31	75
1999-06-30	22