Quarter	US dollars
1986-09-30	470385
1986-12-31	490713
1987-03-31	515078
1987-06-30	536973
1987-09-30	552909
1987-12-31	600517
1988-03-31	600929
1988-06-30	593499
1988-09-30	611119
1988-12-31	619188
1989-03-31	637252
1989-06-30	617229
1989-09-30	647888
1989-12-31	670978
1990-03-31	684127
1990-06-30	691531
1990-09-30	748717
1990-12-31	801660
1991-03-31	743462
1991-06-30	691704
1991-09-30	727396
1991-12-31	727995
1992-03-31	677065
1992-06-30	694763
1992-09-30	755601
1992-12-31	728528
1993-03-31	741964
1993-06-30	722652
1993-09-30	737314
1993-12-31	751507
1994-03-31	761181
1994-06-30	783091
1994-09-30	816912
1994-12-31	853469
1995-03-31	907819
1995-06-30	910762
1995-09-30	899856
1995-12-31	931839
1996-03-31	927234
1996-06-30	919139
1996-09-30	942974
1996-12-31	970710
1997-03-31	992530
1997-06-30	984624
1997-09-30	995492
1997-12-31	1092390
1998-03-31	1089972
1998-06-30	1125477
1998-09-30	1228714
1998-12-31	1188584