Bi-annual	US dollars
1987-06-30	256
1987-12-31	242
1988-06-30	329
1988-12-31	638
1989-06-30	149
1989-12-31	129
1990-06-30	164
1990-12-31	151
1991-06-30	133
1991-12-31	271
1992-06-30	461
1992-12-31	238
1993-06-30	269
1993-12-31	247
1994-06-30	312
1994-12-31	152
1995-06-30	92
1995-12-31	121
1996-06-30	75
1996-12-31	156
1997-06-30	213
1997-12-31	33
1998-06-30	63
1998-12-31	47
1999-06-30	312