Bi-annual	US dollars
1987-06-30	132
1987-12-31	245
1988-06-30	121
1988-12-31	141
1989-06-30	290
1989-12-31	331
1990-06-30	237
1990-12-31	334
1991-06-30	232
1991-12-31	269
1992-06-30	171
1992-12-31	123
1993-06-30	156
1993-12-31	338
1994-06-30	188
1994-12-31	171
1995-06-30	177
1995-12-31	118
1996-06-30	332
1996-12-31	330
1997-06-30	745
1997-12-31	997
1998-06-30	1439
1998-12-31	439
1999-06-30	413