Quarter	US dollars
1986-09-30	50015
1986-12-31	49828
1987-03-31	47682
1987-06-30	49760
1987-09-30	48755
1987-12-31	51977
1988-03-31	50813
1988-06-30	53074
1988-09-30	55150
1988-12-31	58409
1989-03-31	59427
1989-06-30	61756
1989-09-30	60782
1989-12-31	59804
1990-03-31	60687
1990-06-30	62622
1990-09-30	71502
1990-12-31	76728
1991-03-31	74005
1991-06-30	75843
1991-09-30	76457
1991-12-31	76137
1992-03-31	72440
1992-06-30	74892
1992-09-30	70584
1992-12-31	68648
1993-03-31	64705
1993-06-30	62355
1993-09-30	64443
1993-12-31	64770
1994-03-31	64397
1994-06-30	66003
1994-09-30	63864
1994-12-31	62503
1995-03-31	66841
1995-06-30	66891
1995-09-30	61461
1995-12-31	63342
1996-03-31	68443
1996-06-30	68693
1996-09-30	64171
1996-12-31	69078
1997-03-31	67614
1997-06-30	68097
1997-09-30	66002
1997-12-31	65586
1998-03-31	65926
1998-06-30	63227
1998-09-30	71977
1998-12-31	70757