Bi-annual	US dollars
1987-06-30	79
1987-12-31	66
1988-06-30	65
1988-12-31	98
1989-06-30	78
1989-12-31	66
1990-06-30	70
1990-12-31	17
1991-06-30	37
1991-12-31	37
1992-06-30	137
1992-12-31	115
1993-06-30	272
1993-12-31	120
1994-06-30	131
1994-12-31	144
1995-06-30	255
1995-12-31	141
1996-06-30	177
1996-12-31	154
1997-06-30	246
1997-12-31	202
1998-06-30	152
1998-12-31	181
1999-06-30	161