Bi-annual	US dollars
1987-06-30	271
1987-12-31	425
1988-06-30	298
1988-12-31	362
1989-06-30	141
1989-12-31	214
1990-06-30	167
1990-12-31	77
1991-06-30	83
1991-12-31	84
1992-06-30	57
1992-12-31	55
1993-06-30	167
1993-12-31	229
1994-06-30	282
1994-12-31	186
1995-06-30	290
1995-12-31	172
1996-06-30	162
1996-12-31	183
1997-06-30	163
1997-12-31	118
1998-06-30	153
1998-12-31	80
1999-06-30	194