Bi-annual	US dollars
1987-06-30	163
1987-12-31	192
1988-06-30	353
1988-12-31	378
1989-06-30	552
1989-12-31	658
1990-06-30	694
1990-12-31	511
1991-06-30	255
1991-12-31	275
1992-06-30	88
1992-12-31	261
1993-06-30	257
1993-12-31	133
1994-06-30	279
1994-12-31	136
1995-06-30	78
1995-12-31	116
1996-06-30	64
1996-12-31	51
1997-06-30	62
1997-12-31	49
1998-06-30	130
1998-12-31	57
1999-06-30	44