Bi-annual	US dollars
1987-06-30	166
1987-12-31	247
1988-06-30	258
1988-12-31	264
1989-06-30	284
1989-12-31	314
1990-06-30	290
1990-12-31	152
1991-06-30	178
1991-12-31	207
1992-06-30	285
1992-12-31	191
1993-06-30	465
1993-12-31	291
1994-06-30	356
1994-12-31	535
1995-06-30	259
1995-12-31	319
1996-06-30	378
1996-12-31	146
1997-06-30	253
1997-12-31	288
1998-06-30	228
1998-12-31	238
1999-06-30	237