Quarter	US dollars
1986-09-30	19656
1986-12-31	19144
1987-03-31	19427
1987-06-30	19001
1987-09-30	19702
1987-12-31	19188
1988-03-31	17355
1988-06-30	17224
1988-09-30	20131
1988-12-31	17676
1989-03-31	18722
1989-06-30	16393
1989-09-30	17862
1989-12-31	17324
1990-03-31	20122
1990-06-30	18255
1990-09-30	16848
1990-12-31	17955
1991-03-31	18768
1991-06-30	17538
1991-09-30	18374
1991-12-31	16352
1992-03-31	17019
1992-06-30	18849
1992-09-30	16135
1992-12-31	16721
1993-03-31	16557
1993-06-30	17411
1993-09-30	16050
1993-12-31	15499
1994-03-31	15453
1994-06-30	16385
1994-09-30	17272
1994-12-31	14757
1995-03-31	16020
1995-06-30	17170
1995-09-30	17188
1995-12-31	18822
1996-03-31	22132
1996-06-30	24594
1996-09-30	25668
1996-12-31	26003
1997-03-31	26898
1997-06-30	28695
1997-09-30	36061
1997-12-31	41081
1998-03-31	39214
1998-06-30	42395
1998-09-30	53621
1998-12-31	61737
1999-03-31	60895
1999-06-30	58317
1999-09-30	53353
1999-12-31	54346
2000-03-31	54782
2000-06-30	53770
2000-09-30	50693
2000-12-31	65819
2001-03-31	64941
2001-06-30	52063
2001-09-30	46905
2001-12-31	64643
2002-03-31	58392
2002-06-30	60835
2002-09-30	64779
2002-12-31	71139
2003-03-31	90788
2003-06-30	102036
2003-09-30	112484
2003-12-31	125270
2004-03-31	153789
2004-06-30	149577
2004-09-30	165149
2004-12-31	206050
2005-03-31	217592
2005-06-30	226194
2005-09-30	200398
2005-12-31	222267
2006-03-31	244024
2006-06-30	270236
2006-09-30	218387
2006-12-31	222681
2007-03-31	263333
2007-06-30	260607
2007-09-30	273707
2007-12-31	316175
2008-03-31	356287
2008-06-30	287013
2008-09-30	262463
2008-12-31	227952
2009-03-31	173365
2009-06-30	172471
2009-09-30	154223
2009-12-31	190646
2010-03-31	161001
2010-06-30	160753
2010-09-30	167391
2010-12-31	182815
2011-03-31	167990
2011-06-30	167034
2011-09-30	137658
2011-12-31	135866
2012-03-31	144220
2012-06-30	144622
2012-09-30	120714
2012-12-31	130702
2013-03-31	133728
2013-06-30	134341
2013-09-30	150270
2013-12-31	138988
2014-03-31	155058
2014-06-30	174392
2014-09-30	197350
2014-12-31	209206
2015-03-31	207287
2015-06-30	182936
2015-09-30	194028
2015-12-31	177610
2016-03-31	183440
2016-06-30	184774
2016-09-30	207343
2016-12-31	216244
2017-03-31	172195
2017-06-30	156318
2017-09-30	235819
2017-12-31	243830
2018-03-31	192684
2018-06-30	174174
2018-09-30	152295
2018-12-31	164930
2019-03-31	159938
2019-06-30	152639
2019-09-30	127079
2019-12-31	154587
2020-03-31	139789
2020-06-30	126590
2020-09-30	120455
2020-12-31	133791
2021-03-31	139615
2021-06-30	151445
2021-09-30	142102
2021-12-31	175766
2022-03-31	176683
2022-06-30	179274
2022-09-30	147576
2022-12-31	129885
2023-03-31	129424
2023-06-30	120927
2023-09-30	111678