Bi-annual	US dollars
1987-06-30	39
1987-12-31	53
1988-06-30	78
1988-12-31	61
1989-06-30	91
1989-12-31	102
1990-06-30	106
1990-12-31	127
1991-06-30	115
1991-12-31	92
1992-06-30	95
1992-12-31	23
1993-06-30	44
1993-12-31	90
1994-06-30	77
1994-12-31	78
1995-06-30	78
1995-12-31	65
1996-06-30	30
1996-12-31	22
1997-06-30	55
1997-12-31	82
1998-06-30	152
1998-12-31	123
1999-06-30	123