Bi-annual	US dollars
1987-06-30	40
1987-12-31	34
1988-06-30	29
1988-12-31	199
1989-06-30	209
1989-12-31	327
1990-06-30	312
1990-12-31	278
1991-06-30	358
1991-12-31	394
1992-06-30	381
1992-12-31	417
1993-06-30	459
1993-12-31	600
1994-06-30	545
1994-12-31	609
1995-06-30	619
1995-12-31	488
1996-06-30	527
1996-12-31	575
1997-06-30	456
1997-12-31	571
1998-06-30	372
1998-12-31	70
1999-06-30	22