Bi-annual	US dollars
1987-06-30	92
1987-12-31	147
1988-06-30	188
1988-12-31	155
1989-06-30	85
1989-12-31	90
1990-06-30	63
1990-12-31	93
1991-06-30	76
1991-12-31	52
1992-06-30	82
1992-12-31	111
1993-06-30	35
1993-12-31	71
1994-06-30	25
1994-12-31	36
1995-06-30	21
1995-12-31	2
1996-06-30	5
1996-12-31	67
1997-06-30	87
1997-12-31	61
1998-06-30	35
1998-12-31	83
1999-06-30	102