Bi-annual	US dollars
1987-06-30	419
1987-12-31	491
1988-06-30	372
1988-12-31	463
1989-06-30	186
1989-12-31	264
1990-06-30	209
1990-12-31	89
1991-06-30	123
1991-12-31	332
1992-06-30	69
1992-12-31	67
1993-06-30	188
1993-12-31	265
1994-06-30	335
1994-12-31	232
1995-06-30	339
1995-12-31	259
1996-06-30	224
1996-12-31	247
1997-06-30	168
1997-12-31	125
1998-06-30	208
1998-12-31	116
1999-06-30	229