Bi-annual	US dollars
1987-06-30	163
1987-12-31	170
1988-06-30	167
1988-12-31	130
1989-06-30	259
1989-12-31	226
1990-06-30	99
1990-12-31	15
1991-06-30	287
1991-12-31	54
1992-06-30	61
1992-12-31	8
1993-06-30	86
1993-12-31	126
1994-06-30	279
1994-12-31	106
1995-06-30	247
1995-12-31	113
1996-06-30	62
1996-12-31	276
1997-06-30	126
1997-12-31	380
1998-06-30	177
1998-12-31	68
1999-06-30	224