Quarter	US dollars
1986-09-30	1237
1986-12-31	1539
1987-03-31	1881
1987-06-30	1529
1987-09-30	1583
1987-12-31	1877
1988-03-31	1502
1988-06-30	1580
1988-09-30	1455
1988-12-31	1908
1989-03-31	1813
1989-06-30	1767
1989-09-30	2128
1989-12-31	3005
1990-03-31	3026
1990-06-30	2848
1990-09-30	2814
1990-12-31	3185
1991-03-31	2589
1991-06-30	2338
1991-09-30	2502
1991-12-31	2192
1992-03-31	2196
1992-06-30	2145
1992-09-30	2312
1992-12-31	2316
1993-03-31	2185
1993-06-30	1904
1993-09-30	2122
1993-12-31	2156
1994-03-31	2219
1994-06-30	1935
1994-09-30	1769
1994-12-31	2259
1995-03-31	2205
1995-06-30	1998
1995-09-30	2009
1995-12-31	2674
1996-03-31	2740
1996-06-30	4413
1996-09-30	4469
1996-12-31	5660
1997-03-31	4684
1997-06-30	5726
1997-09-30	5476
1997-12-31	6474
1998-03-31	6678
1998-06-30	7727
1998-09-30	17106
1998-12-31	7054
1999-03-31	6845
1999-06-30	5347
1999-09-30	5689
1999-12-31	5576
2000-03-31	4812
2000-06-30	5175
2000-09-30	5443
2000-12-31	6453
2001-03-31	6373
2001-06-30	7415
2001-09-30	7149
2001-12-31	7527
2002-03-31	6706
2002-06-30	7034
2002-09-30	8386
2002-12-31	7484
2003-03-31	8051
2003-06-30	9480
2003-09-30	12654
2003-12-31	13219
2004-03-31	12758
2004-06-30	15630
2004-09-30	19100
2004-12-31	19848
2005-03-31	18284
2005-06-30	22655
2005-09-30	17631
2005-12-31	16573
2006-03-31	17426
2006-06-30	18058
2006-09-30	17893
2006-12-31	18324
2007-03-31	20216
2007-06-30	21981
2007-09-30	27422
2007-12-31	32166
2008-03-31	34235
2008-06-30	29103
2008-09-30	28398
2008-12-31	16647
2009-03-31	14129
2009-06-30	13083
2009-09-30	11960
2009-12-31	15903
2010-03-31	13500
2010-06-30	13016
2010-09-30	13909
2010-12-31	12490
2011-03-31	14205
2011-06-30	15527
2011-09-30	12788
2011-12-31	10844
2012-03-31	10047
2012-06-30	10529
2012-09-30	9583
2012-12-31	10367
2013-03-31	8688
2013-06-30	9755
2013-09-30	9905
2013-12-31	11046
2014-03-31	11786
2014-06-30	12005
2014-09-30	10251
2014-12-31	10521
2015-03-31	10613
2015-06-30	11518
2015-09-30	12321
2015-12-31	10731
2016-03-31	11362
2016-06-30	12312
2016-09-30	10558
2016-12-31	8923
2017-03-31	9335
2017-06-30	8847
2017-09-30	8389
2017-12-31	7985
2018-03-31	8849
2018-06-30	9176
2018-09-30	9040
2018-12-31	10258
2019-03-31	8869
2019-06-30	9164
2019-09-30	8726
2019-12-31	9607
2020-03-31	11705
2020-06-30	10823
2020-09-30	9551
2020-12-31	10451
2021-03-31	11697
2021-06-30	10170
2021-09-30	10511
2021-12-31	10675
2022-03-31	9867
2022-06-30	9109
2022-09-30	9218
2022-12-31	9556
2023-03-31	8930
2023-06-30	8955
2023-09-30	8774