Quarter	US dollars
1986-09-30	15765
1986-12-31	17055
1987-03-31	18860
1987-06-30	17898
1987-09-30	18269
1987-12-31	19650
1988-03-31	19159
1988-06-30	19701
1988-09-30	20185
1988-12-31	22144
1989-03-31	23091
1989-06-30	21460
1989-09-30	21902
1989-12-31	22996
1990-03-31	24555
1990-06-30	24886
1990-09-30	28465
1990-12-31	30716
1991-03-31	29166
1991-06-30	26907
1991-09-30	27460
1991-12-31	27337
1992-03-31	27125
1992-06-30	28322
1992-09-30	31848
1992-12-31	26500
1993-03-31	28083
1993-06-30	27542
1993-09-30	27052
1993-12-31	25933
1994-03-31	29549
1994-06-30	28021
1994-09-30	26098
1994-12-31	25483
1995-03-31	29997
1995-06-30	30556
1995-09-30	31660
1995-12-31	29636
1996-03-31	33091
1996-06-30	33996
1996-09-30	37066
1996-12-31	36171
1997-03-31	40677
1997-06-30	38814
1997-09-30	38692
1997-12-31	49946
1998-03-31	60438
1998-06-30	68129
1998-09-30	97637
1998-12-31	92848
1999-03-31	91007
1999-06-30	84669
1999-09-30	94280
1999-12-31	85239
2000-03-31	106849
2000-06-30	106916
2000-09-30	100366
2000-12-31	95453
2001-03-31	119443
2001-06-30	111669
2001-09-30	125075
2001-12-31	121838
2002-03-31	122330
2002-06-30	126513
2002-09-30	136035
2002-12-31	161270
2003-03-31	163874
2003-06-30	172159
2003-09-30	163312
2003-12-31	174816
2004-03-31	190380
2004-06-30	184774
2004-09-30	189633
2004-12-31	209018
2005-03-31	236585
2005-06-30	235627
2005-09-30	247025
2005-12-31	259709
2006-03-31	286034
2006-06-30	344137
2006-09-30	271406
2006-12-31	293881
2007-03-31	312248
2007-06-30	353853
2007-09-30	354042
2007-12-31	435085
2008-03-31	530005
2008-06-30	467685
2008-09-30	427116
2008-12-31	394929
2009-03-31	367521
2009-06-30	399421
2009-09-30	394716
2009-12-31	363477
2010-03-31	355019
2010-06-30	381357
2010-09-30	423577
2010-12-31	327516
2011-03-31	387810
2011-06-30	378255
2011-09-30	409371
2011-12-31	384519
2012-03-31	409327
2012-06-30	380122
2012-09-30	376866
2012-12-31	394970
2013-03-31	344284
2013-06-30	332247
2013-09-30	330517
2013-12-31	306809
2014-03-31	341870
2014-06-30	310514
2014-09-30	290881
2014-12-31	294862
2015-03-31	302784
2015-06-30	283759
2015-09-30	289147
2015-12-31	258696
2016-03-31	279553
2016-06-30	300254
2016-09-30	298529
2016-12-31	235528
2017-03-31	242087
2017-06-30	267640
2017-09-30	281695
2017-12-31	308885
2018-03-31	322526
2018-06-30	300773
2018-09-30	287615
2018-12-31	247433
2019-03-31	226871
2019-06-30	242314
2019-09-30	248081
2019-12-31	222105
2020-03-31	232160
2020-06-30	227552
2020-09-30	217812
2020-12-31	184662
2021-03-31	174287
2021-06-30	164647
2021-09-30	157604
2021-12-31	152862
2022-03-31	149810
2022-06-30	149286
2022-09-30	132792
2022-12-31	134446
2023-03-31	134626
2023-06-30	122144
2023-09-30	122414