Bi-annual	US dollars
1987-06-30	471
1987-12-31	376
1988-06-30	358
1988-12-31	398
1989-06-30	335
1989-12-31	242
1990-06-30	167
1990-12-31	251
1991-06-30	138
1991-12-31	202
1992-06-30	194
1992-12-31	211
1993-06-30	242
1993-12-31	185
1994-06-30	97
1994-12-31	84
1995-06-30	17
1995-12-31	20
1996-06-30	22
1996-12-31	14
1997-06-30	2
1997-12-31	5
1998-06-30	87
1998-12-31	133
1999-06-30	177