Quarter	US dollars
1986-09-30	10585
1986-12-31	10373
1987-03-31	10406
1987-06-30	10514
1987-09-30	10272
1987-12-31	10685
1988-03-31	9992
1988-06-30	10385
1988-09-30	10638
1988-12-31	11088
1989-03-31	11020
1989-06-30	10707
1989-09-30	10333
1989-12-31	10725
1990-03-31	10935
1990-06-30	11044
1990-09-30	11358
1990-12-31	11379
1991-03-31	9388
1991-06-30	8931
1991-09-30	8357
1991-12-31	9565
1992-03-31	10242
1992-06-30	12444
1992-09-30	12095
1992-12-31	11512
1993-03-31	11407
1993-06-30	11325
1993-09-30	11262
1993-12-31	11953
1994-03-31	12107
1994-06-30	12570
1994-09-30	12949
1994-12-31	13128
1995-03-31	13425
1995-06-30	13432
1995-09-30	13801
1995-12-31	13690
1996-03-31	13574
1996-06-30	13914
1996-09-30	14127
1996-12-31	13335
1997-03-31	14461
1997-06-30	15883
1997-09-30	16449
1997-12-31	17552
1998-03-31	17647
1998-06-30	20746
1998-09-30	21267
1998-12-31	21383