Bi-annual	US dollars
1987-06-30	76
1987-12-31	213
1988-06-30	176
1988-12-31	163
1989-06-30	198
1989-12-31	161
1990-06-30	125
1990-12-31	71
1991-06-30	81
1991-12-31	82
1992-06-30	86
1992-12-31	95
1993-06-30	181
1993-12-31	237
1994-06-30	183
1994-12-31	413
1995-06-30	180
1995-12-31	233
1996-06-30	282
1996-12-31	317
1997-06-30	449
1997-12-31	373
1998-06-30	702
1998-12-31	571
1999-06-30	720