Bi-annual	US dollars
1987-06-30	81
1987-12-31	79
1988-06-30	84
1988-12-31	139
1989-06-30	64
1989-12-31	76
1990-06-30	87
1990-12-31	87
1991-06-30	68
1991-12-31	155
1992-06-30	234
1992-12-31	280
1993-06-30	312
1993-12-31	304
1994-06-30	252
1994-12-31	191
1995-06-30	299
1995-12-31	211
1996-06-30	325
1996-12-31	168
1997-06-30	218
1997-12-31	201
1998-06-30	193
1998-12-31	268
1999-06-30	336