Bi-annual	US dollars
1987-06-30	366
1987-12-31	396
1988-06-30	358
1988-12-31	242
1989-06-30	378
1989-12-31	577
1990-06-30	624
1990-12-31	592
1991-06-30	593
1991-12-31	700
1992-06-30	702
1992-12-31	526
1993-06-30	506
1993-12-31	464
1994-06-30	468
1994-12-31	713
1995-06-30	652
1995-12-31	378
1996-06-30	419
1996-12-31	342
1997-06-30	349
1997-12-31	392
1998-06-30	348
1998-12-31	333
1999-06-30	326