Bi-annual	US dollars
1987-06-30	226
1987-12-31	225
1988-06-30	500
1988-12-31	118
1989-06-30	250
1989-12-31	250
1990-06-30	333
1990-12-31	201
1991-06-30	295
1991-12-31	194
1992-06-30	316
1992-12-31	147
1993-06-30	398
1993-12-31	152
1994-06-30	401
1994-12-31	299
1995-06-30	506
1995-12-31	509
1996-06-30	416
1996-12-31	142
1997-06-30	243
1997-12-31	137
1998-06-30	263
1998-12-31	53
1999-06-30	456