Quarter US dollars 2004-12-31 310841 2005-03-31 385916 2005-06-30 381487 2005-09-30 462957 2005-12-31 346657 2006-03-31 418635 2006-06-30 424075 2006-09-30 469086 2006-12-31 472165 2007-03-31 525664 2007-06-30 514800 2007-09-30 589383 2007-12-31 608642 2008-03-31 703440 2008-06-30 663889 2008-09-30 703965 2008-12-31 568943 2009-03-31 476016 2009-06-30 490465 2009-09-30 481728 2009-12-31 468844 2010-03-31 538730 2010-06-30 487858 2010-09-30 549005 2010-12-31 473695 2011-03-31 491848 2011-06-30 486873 2011-09-30 512043 2011-12-31 457539 2012-03-31 496904 2012-06-30 503207 2012-09-30 509822 2012-12-31 478038 2013-03-31 461486 2013-06-30 463308 2013-09-30 451919 2013-12-31 405757 2014-03-31 413007 2014-06-30 400295 2014-09-30 365634 2014-12-31 354021 2015-03-31 363455 2015-06-30 326844 2015-09-30 321506 2015-12-31 298874 2016-03-31 299462 2016-06-30 291797 2016-09-30 269510 2016-12-31 247816 2017-03-31 282543 2017-06-30 352200 2017-09-30 325082 2017-12-31 359702 2018-03-31 439525 2018-06-30 463497 2018-09-30 408830 2018-12-31 414014 2019-03-31 446850 2019-06-30 569570 2019-09-30 619735 2019-12-31 564087 2020-03-31 713239 2020-06-30 638020 2020-09-30 674190 2020-12-31 722227 2021-03-31 753641 2021-06-30 706733 2021-09-30 677703 2021-12-31 687687 2022-03-31 780684 2022-06-30 735559 2022-09-30 747372 2022-12-31 729560 2023-03-31 782596 2023-06-30 776338 2023-09-30 794606