Bi-annual	US dollars
1987-06-30	560
1987-12-31	209
1988-06-30	188
1988-12-31	197
1989-06-30	124
1989-12-31	242
1990-06-30	176
1990-12-31	152
1991-06-30	104
1991-12-31	189
1992-06-30	447
1992-12-31	398
1993-06-30	641
1993-12-31	610
1994-06-30	867
1994-12-31	529
1995-06-30	402
1995-12-31	662
1996-06-30	716
1996-12-31	1061
1997-06-30	601
1997-12-31	842
1998-06-30	914
1998-12-31	684
1999-06-30	766