Quarter	US dollars
1986-09-30	9613
1986-12-31	9448
1987-03-31	9557
1987-06-30	10181
1987-09-30	9997
1987-12-31	11781
1988-03-31	10852
1988-06-30	10379
1988-09-30	10952
1988-12-31	11298
1989-03-31	11573
1989-06-30	11409
1989-09-30	11188
1989-12-31	13080
1990-03-31	12556
1990-06-30	12268
1990-09-30	14335
1990-12-31	14100
1991-03-31	13294
1991-06-30	11832
1991-09-30	12731
1991-12-31	13034
1992-03-31	12089
1992-06-30	12989
1992-09-30	12842
1992-12-31	10591
1993-03-31	12106
1993-06-30	10579
1993-09-30	10059
1993-12-31	8012
1994-03-31	7842
1994-06-30	8300
1994-09-30	7847
1994-12-31	9941
1995-03-31	9341
1995-06-30	8991
1995-09-30	7827
1995-12-31	10190
1996-03-31	9614
1996-06-30	9636
1996-09-30	9625
1996-12-31	11569
1997-03-31	9930
1997-06-30	9963
1997-09-30	12257
1997-12-31	14936
1998-03-31	16229
1998-06-30	16515
1998-09-30	20132
1998-12-31	17503
1999-03-31	17579
1999-06-30	19964
1999-09-30	17089
1999-12-31	15329
2000-03-31	16089
2000-06-30	17804
2000-09-30	18012
2000-12-31	17508
2001-03-31	17833
2001-06-30	17251
2001-09-30	17493
2001-12-31	14570
2002-03-31	16218
2002-06-30	13704
2002-09-30	13630
2002-12-31	15360
2003-03-31	18364
2003-06-30	18847
2003-09-30	18753
2003-12-31	22123
2004-03-31	23420
2004-06-30	23047
2004-09-30	26606
2004-12-31	29269
2005-03-31	35777
2005-06-30	36523
2005-09-30	32233
2005-12-31	29896
2006-03-31	38189
2006-06-30	32679
2006-09-30	39267
2006-12-31	39461
2007-03-31	41403
2007-06-30	42846
2007-09-30	44996
2007-12-31	51582
2008-03-31	50184
2008-06-30	56170
2008-09-30	43847
2008-12-31	42445
2009-03-31	48414
2009-06-30	52897
2009-09-30	47537
2009-12-31	41623
2010-03-31	41383
2010-06-30	34447
2010-09-30	46177
2010-12-31	36677
2011-03-31	43173
2011-06-30	43999
2011-09-30	42567
2011-12-31	35202
2012-03-31	45493
2012-06-30	45202
2012-09-30	45215
2012-12-31	33581
2013-03-31	32158
2013-06-30	32716
2013-09-30	33677
2013-12-31	30605
2014-03-31	26727
2014-06-30	23709
2014-09-30	19885
2014-12-31	19768
2015-03-31	22972
2015-06-30	22825
2015-09-30	22538
2015-12-31	17881
2016-03-31	19964
2016-06-30	18532
2016-09-30	19611
2016-12-31	18199
2017-03-31	16233
2017-06-30	17310
2017-09-30	18003
2017-12-31	21359
2018-03-31	22132
2018-06-30	22146
2018-09-30	15348
2018-12-31	12734
2019-03-31	11611
2019-06-30	13992
2019-09-30	12914
2019-12-31	11190
2020-03-31	12910
2020-06-30	11996
2020-09-30	11886
2020-12-31	13553
2021-03-31	10425
2021-06-30	9313
2021-09-30	10533
2021-12-31	13872
2022-03-31	12674
2022-06-30	12553
2022-09-30	10491
2022-12-31	13093
2023-03-31	13631
2023-06-30	12188
2023-09-30	13984