Bi-annual	US dollars
1987-06-30	87
1987-12-31	66
1988-06-30	87
1988-12-31	54
1989-06-30	26
1989-12-31	27
1990-06-30	37
1990-12-31	56
1991-06-30	37
1991-12-31	45
1992-06-30	67
1992-12-31	74
1993-06-30	75
1993-12-31	61
1994-06-30	105
1994-12-31	55
1995-06-30	81
1995-12-31	74
1996-06-30	71
1996-12-31	80
1997-06-30	77
1997-12-31	72
1998-06-30	83
1998-12-31	73
1999-06-30	93