Bi-annual	US dollars
1987-06-30	124
1987-12-31	85
1988-06-30	72
1988-12-31	80
1989-06-30	16
1989-12-31	77
1990-06-30	49
1990-12-31	91
1991-06-30	11
1991-12-31	28
1992-06-30	15
1992-12-31	74
1993-06-30	236
1993-12-31	46
1994-06-30	71
1994-12-31	74
1995-06-30	52
1995-12-31	53
1996-06-30	85
1996-12-31	94
1997-06-30	96
1997-12-31	105
1998-06-30	7
1998-12-31	178
1999-06-30	137