Bi-annual	US dollars
1987-06-30	90
1987-12-31	119
1988-06-30	58
1988-12-31	130
1989-06-30	84
1989-12-31	37
1990-06-30	26
1990-12-31	19
1991-06-30	8
1991-12-31	9
1992-06-30	10
1992-12-31	12
1993-06-30	14
1993-12-31	15
1994-06-30	56
1994-12-31	19
1995-06-30	113
1995-12-31	118
1996-06-30	112
1996-12-31	115
1997-06-30	101
1997-12-31	51
1998-06-30	67
1998-12-31	52
1999-06-30	44