Quarter	US dollars
1986-09-30	2551
1986-12-31	2780
1987-03-31	3467
1987-06-30	2951
1987-09-30	3397
1987-12-31	3929
1988-03-31	4589
1988-06-30	3083
1988-09-30	3099
1988-12-31	4572
1989-03-31	4653
1989-06-30	4697
1989-09-30	4684
1989-12-31	4765
1990-03-31	4722
1990-06-30	5568
1990-09-30	5551
1990-12-31	6773
1991-03-31	6369
1991-06-30	7010
1991-09-30	7997
1991-12-31	5747
1992-03-31	6045
1992-06-30	7298
1992-09-30	6291
1992-12-31	5556
1993-03-31	5240
1993-06-30	4549
1993-09-30	5076
1993-12-31	3560
1994-03-31	4728
1994-06-30	5160
1994-09-30	5408
1994-12-31	5079
1995-03-31	5853
1995-06-30	5849
1995-09-30	5720
1995-12-31	6491
1996-03-31	7354
1996-06-30	7589
1996-09-30	7598
1996-12-31	7420
1997-03-31	7825
1997-06-30	7590
1997-09-30	6947
1997-12-31	6058
1998-03-31	6020
1998-06-30	9099
1998-09-30	9270
1998-12-31	8812
1999-03-31	7515
1999-06-30	10282
1999-09-30	10129
1999-12-31	10139
2000-03-31	14783
2000-06-30	12048
2000-09-30	11494
2000-12-31	10279
2001-03-31	11397
2001-06-30	11993
2001-09-30	13500
2001-12-31	10979
2002-03-31	16718
2002-06-30	14097
2002-09-30	17075
2002-12-31	10500
2003-03-31	17984
2003-06-30	17597
2003-09-30	19903
2003-12-31	18412
2004-03-31	21123
2004-06-30	27012
2004-09-30	26354
2004-12-31	20735
2005-03-31	25668
2005-06-30	24665
2005-09-30	28149
2005-12-31	20699
2006-03-31	22958
2006-06-30	21416
2006-09-30	18665
2006-12-31	21992
2007-03-31	21348
2007-06-30	22778
2007-09-30	27851
2007-12-31	22801
2008-03-31	24052
2008-06-30	21992
2008-09-30	26406
2008-12-31	18796
2009-03-31	21798
2009-06-30	21021
2009-09-30	18112
2009-12-31	19106
2010-03-31	19626
2010-06-30	19809
2010-09-30	17679
2010-12-31	16269
2011-03-31	19867
2011-06-30	16484
2011-09-30	26489
2011-12-31	20127
2012-03-31	24894
2012-06-30	22620
2012-09-30	24511
2012-12-31	23734
2013-03-31	21785
2013-06-30	24321
2013-09-30	23395
2013-12-31	20322
2014-03-31	28669
2014-06-30	26307
2014-09-30	22168
2014-12-31	17901
2015-03-31	19065
2015-06-30	18740
2015-09-30	17553
2015-12-31	15709
2016-03-31	24788
2016-06-30	23935
2016-09-30	29038
2016-12-31	24714
2017-03-31	29359
2017-06-30	29141
2017-09-30	29602
2017-12-31	31892
2018-03-31	35115
2018-06-30	40338
2018-09-30	40806
2018-12-31	33500
2019-03-31	40376
2019-06-30	42233
2019-09-30	32822
2019-12-31	36438
2020-03-31	37578
2020-06-30	37785
2020-09-30	45489
2020-12-31	40200
2021-03-31	44106
2021-06-30	43942
2021-09-30	40880
2021-12-31	39285
2022-03-31	47723
2022-06-30	40412
2022-09-30	40824
2022-12-31	36974
2023-03-31	41954
2023-06-30	47162
2023-09-30	43529