Quarter	US dollars
1999-09-30	861334
1999-12-31	865589
2000-03-31	966530
2000-06-30	959970
2000-09-30	988374
2000-12-31	1068967
2001-03-31	1124689
2001-06-30	1089349
2001-09-30	1131602
2001-12-31	1152031
2002-03-31	1193490
2002-06-30	1254377
2002-09-30	1332666
2002-12-31	1354371
2003-03-31	1519668
2003-06-30	1570380
2003-09-30	1642711
2003-12-31	1637407
2004-03-31	1804771
2004-06-30	1846479
2004-09-30	2031598
2004-12-31	2115044
2005-03-31	2316046
2005-06-30	2338080
2005-09-30	2585007
2005-12-31	2461694
2006-03-31	2765693
2006-06-30	2865878
2006-09-30	3033292
2006-12-31	3096420
2007-03-31	3408204
2007-06-30	3467822
2007-09-30	3882818
2007-12-31	3840255
2008-03-31	4274518
2008-06-30	4105202
2008-09-30	4259877
2008-12-31	3644599
2009-03-31	3590172
2009-06-30	3693949
2009-09-30	3731068
2009-12-31	3695567
2010-03-31	3920354
2010-06-30	3944226
2010-09-30	4138199
2010-12-31	4003998
2011-03-31	4167221
2011-06-30	4248315
2011-09-30	4197143
2011-12-31	4031147
2012-03-31	4284664
2012-06-30	4133250
2012-09-30	4113911
2012-12-31	4062883
2013-03-31	3893685
2013-06-30	3911448
2013-09-30	3928638
2013-12-31	3789104
2014-03-31	3843680
2014-06-30	3808488
2014-09-30	3692460
2014-12-31	3598741
2015-03-31	3513736
2015-06-30	3409413
2015-09-30	3209881
2015-12-31	3046603
2016-03-31	3106361
2016-06-30	3199999
2016-09-30	3097547
2016-12-31	2981662
2017-03-31	3165777
2017-06-30	3306091
2017-09-30	3380623
2017-12-31	3457425
2018-03-31	3549203
2018-06-30	3431609
2018-09-30	3425414
2018-12-31	3397503
2019-03-31	3543348
2019-06-30	3642677
2019-09-30	3619543
2019-12-31	3599338
2020-03-31	3850234
2020-06-30	3825192
2020-09-30	3889646
2020-12-31	4008249
2021-03-31	4062232
2021-06-30	4146406
2021-09-30	4159285
2021-12-31	4195735
2022-03-31	4246426
2022-06-30	4115365
2022-09-30	4042631
2022-12-31	4107369
2023-03-31	4277537
2023-06-30	4413577
2023-09-30	4393030