Bi-annual	US dollars
1987-06-30	271
1987-12-31	283
1988-06-30	280
1988-12-31	286
1989-06-30	250
1989-12-31	248
1990-06-30	223
1990-12-31	241
1991-06-30	133
1991-12-31	148
1992-06-30	126
1992-12-31	136
1993-06-30	134
1993-12-31	106
1994-06-30	110
1994-12-31	147
1995-06-30	146
1995-12-31	147
1996-06-30	143
1996-12-31	187
1997-06-30	230
1997-12-31	151
1998-06-30	57
1998-12-31	311
1999-06-30	14