Bi-annual	US dollars
1987-06-30	840
1987-12-31	1170
1988-06-30	998
1988-12-31	982
1989-06-30	307
1989-12-31	1014
1990-06-30	434
1990-12-31	232
1991-06-30	83
1991-12-31	318
1992-06-30	320
1992-12-31	377
1993-06-30	293
1993-12-31	226
1994-06-30	228
1994-12-31	191
1995-06-30	162
1995-12-31	186
1996-06-30	110
1996-12-31	110
1997-06-30	223
1997-12-31	326
1998-06-30	245
1998-12-31	80
1999-06-30	66