Bi-annual	US dollars
1987-06-30	134
1987-12-31	130
1988-06-30	119
1988-12-31	165
1989-06-30	65
1989-12-31	31
1990-06-30	37
1990-12-31	14
1991-06-30	18
1991-12-31	37
1992-06-30	69
1992-12-31	74
1993-06-30	146
1993-12-31	133
1994-06-30	213
1994-12-31	224
1995-06-30	218
1995-12-31	185
1996-06-30	186
1996-12-31	276
1997-06-30	145
1997-12-31	132
1998-06-30	117
1998-12-31	121
1999-06-30	360