Quarter	US dollars
1986-09-30	22967
1986-12-31	23047
1987-03-31	26496
1987-06-30	23416
1987-09-30	22925
1987-12-31	28659
1988-03-31	27607
1988-06-30	25721
1988-09-30	27832
1988-12-31	26602
1989-03-31	27271
1989-06-30	26455
1989-09-30	25736
1989-12-31	28354
1990-03-31	29525
1990-06-30	27895
1990-09-30	29634
1990-12-31	43372
1991-03-31	30612
1991-06-30	31313
1991-09-30	31436
1991-12-31	34811
1992-03-31	32704
1992-06-30	32526
1992-09-30	38530
1992-12-31	37522
1993-03-31	35064
1993-06-30	36263
1993-09-30	40024
1993-12-31	40406
1994-03-31	40235
1994-06-30	41670
1994-09-30	48123
1994-12-31	48381
1995-03-31	59711
1995-06-30	56838
1995-09-30	49182
1995-12-31	50583
1996-03-31	54812
1996-06-30	52675
1996-09-30	50822
1996-12-31	50961
1997-03-31	57267
1997-06-30	57185
1997-09-30	57869
1997-12-31	64199
1998-03-31	63716
1998-06-30	56550
1998-09-30	57837
1998-12-31	59554
1999-03-31	54202
1999-06-30	39811
1999-09-30	47089
1999-12-31	52361
2000-03-31	56648
2000-06-30	60702
2000-09-30	53836
2000-12-31	59374
2001-03-31	66330
2001-06-30	68015
2001-09-30	55123
2001-12-31	53420
2002-03-31	59024
2002-06-30	71887
2002-09-30	66310
2002-12-31	67312
2003-03-31	77985
2003-06-30	74513
2003-09-30	49148
2003-12-31	65495
2004-03-31	72689
2004-06-30	79024
2004-09-30	83565
2004-12-31	81964
2005-03-31	90826
2005-06-30	76243
2005-09-30	81094
2005-12-31	75457
2006-03-31	68669
2006-06-30	66993
2006-09-30	75029
2006-12-31	86146
2007-03-31	106799
2007-06-30	125550
2007-09-30	128041
2007-12-31	117722
2008-03-31	136135
2008-06-30	110672
2008-09-30	113875
2008-12-31	104314
2009-03-31	117662
2009-06-30	103323
2009-09-30	102782
2009-12-31	101002
2010-03-31	83926
2010-06-30	78404
2010-09-30	82163
2010-12-31	72997
2011-03-31	71649
2011-06-30	69775
2011-09-30	72765
2011-12-31	65534
2012-03-31	69046
2012-06-30	71368
2012-09-30	71405
2012-12-31	68081
2013-03-31	64200
2013-06-30	63168
2013-09-30	62234
2013-12-31	59142
2014-03-31	64579
2014-06-30	77713
2014-09-30	65315
2014-12-31	65856
2015-03-31	71284
2015-06-30	62799
2015-09-30	67394
2015-12-31	65807
2016-03-31	72190
2016-06-30	70117
2016-09-30	70126
2016-12-31	61020
2017-03-31	52545
2017-06-30	58289
2017-09-30	59206
2017-12-31	58607
2018-03-31	61675
2018-06-30	64029
2018-09-30	58297
2018-12-31	53692
2019-03-31	47056
2019-06-30	48030
2019-09-30	51670
2019-12-31	61561
2020-03-31	71893
2020-06-30	63861
2020-09-30	60898
2020-12-31	54772
2021-03-31	58592
2021-06-30	56798
2021-09-30	56332
2021-12-31	62017
2022-03-31	62890
2022-06-30	56829
2022-09-30	47562
2022-12-31	56380
2023-03-31	49651
2023-06-30	51532
2023-09-30	49673