Bi-annual	US dollars
1987-06-30	756
1987-12-31	749
1988-06-30	662
1988-12-31	607
1989-06-30	801
1989-12-31	701
1990-06-30	698
1990-12-31	758
1991-06-30	628
1991-12-31	575
1992-06-30	641
1992-12-31	542
1993-06-30	498
1993-12-31	350
1994-06-30	227
1994-12-31	283
1995-06-30	162
1995-12-31	287
1996-06-30	670
1996-12-31	353
1997-06-30	1160
1997-12-31	1142
1998-06-30	524
1998-12-31	664
1999-06-30	883