Bi-annual	US dollars
1987-06-30	52
1987-12-31	72
1988-06-30	84
1988-12-31	52
1989-06-30	17
1989-12-31	24
1990-06-30	21
1990-12-31	17
1991-06-30	24
1991-12-31	49
1992-06-30	103
1992-12-31	77
1993-06-30	248
1993-12-31	281
1994-06-30	312
1994-12-31	386
1995-06-30	426
1995-12-31	544
1996-06-30	475
1996-12-31	305
1997-06-30	314
1997-12-31	490
1998-06-30	722
1998-12-31	802
1999-06-30	1099