Bi-annual	US dollars
1987-06-30	395
1987-12-31	234
1988-06-30	225
1988-12-31	226
1989-06-30	246
1989-12-31	268
1990-06-30	234
1990-12-31	270
1991-06-30	282
1991-12-31	353
1992-06-30	310
1992-12-31	292
1993-06-30	303
1993-12-31	1550
1994-06-30	256
1994-12-31	472
1995-06-30	337
1995-12-31	332
1996-06-30	269
1996-12-31	395
1997-06-30	474
1997-12-31	214
1998-06-30	1032
1998-12-31	411
1999-06-30	309