Bi-annual	US dollars
1987-06-30	248
1987-12-31	255
1988-06-30	213
1988-12-31	237
1989-06-30	243
1989-12-31	247
1990-06-30	258
1990-12-31	60
1991-06-30	105
1991-12-31	84
1992-06-30	49
1992-12-31	102
1993-06-30	420
1993-12-31	183
1994-06-30	69
1994-12-31	130
1995-06-30	118
1995-12-31	158
1996-06-30	143
1996-12-31	55
1997-06-30	143
1997-12-31	163
1998-06-30	148
1998-12-31	153
1999-06-30	129