Bi-annual	US dollars
1987-06-30	97
1987-12-31	191
1988-06-30	645
1988-12-31	535
1989-06-30	166
1989-12-31	177
1990-06-30	173
1990-12-31	143
1991-06-30	125
1991-12-31	265
1992-06-30	320
1992-12-31	320
1993-06-30	254
1993-12-31	551
1994-06-30	650
1994-12-31	629
1995-06-30	417
1995-12-31	391
1996-06-30	392
1996-12-31	426
1997-06-30	411
1997-12-31	520
1998-06-30	617
1998-12-31	626
1999-06-30	560