Bi-annual	US dollars
1987-06-30	142
1987-12-31	119
1988-06-30	82
1988-12-31	83
1989-06-30	68
1989-12-31	58
1990-06-30	82
1990-12-31	89
1991-06-30	114
1991-12-31	108
1992-06-30	129
1992-12-31	61
1993-06-30	44
1993-12-31	44
1994-06-30	62
1994-12-31	56
1995-06-30	40
1995-12-31	42
1996-06-30	20
1996-12-31	22
1997-06-30	57
1997-12-31	21
1998-06-30	67
1998-12-31	95
1999-06-30	95