Bi-annual	US dollars
1987-06-30	77
1987-12-31	77
1988-06-30	72
1988-12-31	69
1989-06-30	65
1989-12-31	50
1990-06-30	49
1990-12-31	42
1991-06-30	58
1991-12-31	56
1992-06-30	48
1992-12-31	41
1993-06-30	42
1993-12-31	40
1994-06-30	45
1994-12-31	45
1995-06-30	75
1995-12-31	64
1996-06-30	84
1996-12-31	72
1997-06-30	60
1997-12-31	69
1998-06-30	172
1998-12-31	161
1999-06-30	139