Quarter US dollars 2004-12-31 116563 2005-03-31 145164 2005-06-30 147397 2005-09-30 174301 2005-12-31 174573 2006-03-31 179620 2006-06-30 212270 2006-09-30 211622 2006-12-31 202990 2007-03-31 243182 2007-06-30 173806 2007-09-30 224436 2007-12-31 215859 2008-03-31 220859 2008-06-30 238722 2008-09-30 278986 2008-12-31 286798 2009-03-31 326129 2009-06-30 335269 2009-09-30 386955 2009-12-31 411299 2010-03-31 490217 2010-06-30 547558 2010-09-30 572064 2010-12-31 519237 2011-03-31 583173 2011-06-30 554455 2011-09-30 658906 2011-12-31 711353 2012-03-31 803419 2012-06-30 788880 2012-09-30 743130 2012-12-31 755340 2013-03-31 603026 2013-06-30 626717 2013-09-30 603529 2013-12-31 549492 2014-03-31 566143 2014-06-30 499161 2014-09-30 501413 2014-12-31 548808 2015-03-31 510524 2015-06-30 527055 2015-09-30 554395 2015-12-31 532684 2016-03-31 548997 2016-06-30 592330 2016-09-30 560046 2016-12-31 515877 2017-03-31 523197 2017-06-30 583155 2017-09-30 644023 2017-12-31 629246 2018-03-31 663703 2018-06-30 644679 2018-09-30 653032 2018-12-31 631136 2019-03-31 641090 2019-06-30 652327 2019-09-30 621725 2019-12-31 638001 2020-03-31 684376 2020-06-30 746575 2020-09-30 766794 2020-12-31 799633 2021-03-31 842513 2021-06-30 818921 2021-09-30 801103 2021-12-31 789809 2022-03-31 794647 2022-06-30 781911 2022-09-30 692846 2022-12-31 763283 2023-03-31 798060 2023-06-30 852522 2023-09-30 858442