Bi-annual	US dollars
1987-06-30	176
1987-12-31	185
1988-06-30	247
1988-12-31	221
1989-06-30	296
1989-12-31	147
1990-06-30	359
1990-12-31	214
1991-06-30	151
1991-12-31	138
1992-06-30	306
1992-12-31	183
1993-06-30	122
1993-12-31	170
1994-06-30	273
1994-12-31	185
1995-06-30	283
1995-12-31	186
1996-06-30	235
1996-12-31	223
1997-06-30	419
1997-12-31	178
1998-06-30	262
1998-12-31	18
1999-06-30	139