Bi-annual	US dollars
1987-06-30	60
1987-12-31	45
1988-06-30	46
1988-12-31	42
1989-06-30	37
1989-12-31	68
1990-06-30	66
1990-12-31	75
1991-06-30	52
1991-12-31	60
1992-06-30	40
1992-12-31	58
1993-06-30	126
1993-12-31	59
1994-06-30	65
1994-12-31	59
1995-06-30	83
1995-12-31	68
1996-06-30	61
1996-12-31	82
1997-06-30	106
1997-12-31	61
1998-06-30	118
1998-12-31	92
1999-06-30	55