Bi-annual	US dollars
1987-06-30	137
1987-12-31	177
1988-06-30	188
1988-12-31	206
1989-06-30	277
1989-12-31	271
1990-06-30	235
1990-12-31	168
1991-06-30	135
1991-12-31	134
1992-06-30	145
1992-12-31	150
1993-06-30	57
1993-12-31	50
1994-06-30	42
1994-12-31	36
1995-06-30	25
1995-12-31	29
1996-06-30	30
1996-12-31	45
1997-06-30	42
1997-12-31	41
1998-06-30	57
1998-12-31	58
1999-06-30	50