Bi-annual	US dollars
1987-06-30	279
1987-12-31	326
1988-06-30	196
1988-12-31	226
1989-06-30	169
1989-12-31	171
1990-06-30	204
1990-12-31	235
1991-06-30	212
1991-12-31	211
1992-06-30	211
1992-12-31	224
1993-06-30	149
1993-12-31	134
1994-06-30	139
1994-12-31	111
1995-06-30	107
1995-12-31	87
1996-06-30	75
1996-12-31	291
1997-06-30	215
1997-12-31	51
1998-06-30	42
1998-12-31	33
1999-06-30	41