Bi-annual	US dollars
1987-06-30	84
1987-12-31	126
1988-06-30	174
1988-12-31	174
1989-06-30	152
1989-12-31	152
1990-06-30	134
1990-12-31	131
1991-06-30	123
1991-12-31	136
1992-06-30	137
1992-12-31	117
1993-06-30	113
1993-12-31	118
1994-06-30	122
1994-12-31	117
1995-06-30	124
1995-12-31	122
1996-06-30	115
1996-12-31	118
1997-06-30	106
1997-12-31	7
1998-06-30	3
1998-12-31	7
1999-06-30	8