Bi-annual	US dollars
1987-06-30	127
1987-12-31	181
1988-06-30	145
1988-12-31	163
1989-06-30	122
1989-12-31	158
1990-06-30	89
1990-12-31	93
1991-06-30	79
1991-12-31	97
1992-06-30	74
1992-12-31	33
1993-06-30	60
1993-12-31	115
1994-06-30	88
1994-12-31	75
1995-06-30	78
1995-12-31	64
1996-06-30	176
1996-12-31	255
1997-06-30	178
1997-12-31	132
1998-06-30	115
1998-12-31	133
1999-06-30	44