Bi-annual	US dollars
1987-06-30	290
1987-12-31	253
1988-06-30	507
1988-12-31	278
1989-06-30	202
1989-12-31	185
1990-06-30	187
1990-12-31	58
1991-06-30	50
1991-12-31	377
1992-06-30	525
1992-12-31	445
1993-06-30	471
1993-12-31	402
1994-06-30	279
1994-12-31	363
1995-06-30	369
1995-12-31	488
1996-06-30	609
1996-12-31	736
1997-06-30	509
1997-12-31	471
1998-06-30	345
1998-12-31	364
1999-06-30	328