Quarter	US dollars
1986-09-30	7865
1986-12-31	8758
1987-03-31	10362
1987-06-30	9729
1987-09-30	10925
1987-12-31	13172
1988-03-31	14805
1988-06-30	13863
1988-09-30	12973
1988-12-31	13475
1989-03-31	12576
1989-06-30	12961
1989-09-30	14777
1989-12-31	14853
1990-03-31	19646
1990-06-30	19975
1990-09-30	22918
1990-12-31	23004
1991-03-31	24333
1991-06-30	23526
1991-09-30	24362
1991-12-31	25415
1992-03-31	25770
1992-06-30	29218
1992-09-30	44099
1992-12-31	37664
1993-03-31	41980
1993-06-30	37107
1993-09-30	43321
1993-12-31	40476
1994-03-31	40651
1994-06-30	41777
1994-09-30	38327
1994-12-31	40070
1995-03-31	55292
1995-06-30	54417
1995-09-30	51972
1995-12-31	57990
1996-03-31	52775
1996-06-30	54851
1996-09-30	62715
1996-12-31	58022
1997-03-31	54736
1997-06-30	56976
1997-09-30	53596
1997-12-31	58571
1998-03-31	56099
1998-06-30	69803
1998-09-30	73776
1998-12-31	68124