Bi-annual	US dollars
1987-06-30	364
1987-12-31	328
1988-06-30	278
1988-12-31	394
1989-06-30	428
1989-12-31	477
1990-06-30	290
1990-12-31	203
1991-06-30	109
1991-12-31	95
1992-06-30	162
1992-12-31	226
1993-06-30	225
1993-12-31	158
1994-06-30	193
1994-12-31	150
1995-06-30	80
1995-12-31	85
1996-06-30	90
1996-12-31	147
1997-06-30	105
1997-12-31	123
1998-06-30	215
1998-12-31	70
1999-06-30	172