Bi-annual	US dollars
1987-06-30	813
1987-12-31	1021
1988-06-30	1407
1988-12-31	1441
1989-06-30	972
1989-12-31	647
1990-06-30	319
1990-12-31	162
1991-06-30	438
1991-12-31	162
1992-06-30	320
1992-12-31	247
1993-06-30	143
1993-12-31	173
1994-06-30	221
1994-12-31	413
1995-06-30	474
1995-12-31	754
1996-06-30	657
1996-12-31	921
1997-06-30	1211
1997-12-31	1171
1998-06-30	2533
1998-12-31	2335
1999-06-30	2450