Quarter	US dollars
1986-09-30	10391
1986-12-31	12088
1987-03-31	12298
1987-06-30	11944
1987-09-30	11379
1987-12-31	12560
1988-03-31	11378
1988-06-30	10989
1988-09-30	10007
1988-12-31	11196
1989-03-31	10124
1989-06-30	9074
1989-09-30	8287
1989-12-31	9982
1990-03-31	9207
1990-06-30	9598
1990-09-30	10544
1990-12-31	11400
1991-03-31	9600
1991-06-30	9540
1991-09-30	10607
1991-12-31	9675
1992-03-31	10031
1992-06-30	10054
1992-09-30	10348
1992-12-31	9306
1993-03-31	9443
1993-06-30	9102
1993-09-30	9101
1993-12-31	8568
1994-03-31	8335
1994-06-30	7472
1994-09-30	7752
1994-12-31	7746
1995-03-31	8191
1995-06-30	8882
1995-09-30	9675
1995-12-31	9342
1996-03-31	8981
1996-06-30	9269
1996-09-30	10068
1996-12-31	10735
1997-03-31	10465
1997-06-30	11170
1997-09-30	13569
1997-12-31	12722
1998-03-31	12914
1998-06-30	13174
1998-09-30	15746
1998-12-31	16189