Quarter US dollars 2004-12-31 202 2005-03-31 193 2005-06-30 179 2005-09-30 237 2005-12-31 300 2006-03-31 255 2006-06-30 387 2006-09-30 357 2006-12-31 436 2007-03-31 557 2007-06-30 556 2007-09-30 357 2007-12-31 603 2008-03-31 624 2008-06-30 490 2008-09-30 504 2008-12-31 512 2009-03-31 493 2009-06-30 524 2009-09-30 526 2009-12-31 554 2010-03-31 420 2010-06-30 1411 2010-09-30 1293 2010-12-31 1509 2011-03-31 357 2011-06-30 682 2011-09-30 405 2011-12-31 413 2012-03-31 473 2012-06-30 472 2012-09-30 640 2012-12-31 516 2013-03-31 568 2013-06-30 684 2013-09-30 691 2013-12-31 638 2014-03-31 577 2014-06-30 573 2014-09-30 618 2014-12-31 631 2015-03-31 640 2015-06-30 598 2015-09-30 615 2015-12-31 522 2016-03-31 613 2016-06-30 577 2016-09-30 535 2016-12-31 531 2017-03-31 582 2017-06-30 452 2017-09-30 449 2017-12-31 465 2018-03-31 1013 2018-06-30 491 2018-09-30 571 2018-12-31 548 2019-03-31 696 2019-06-30 759 2019-09-30 841 2019-12-31 836 2020-03-31 924 2020-06-30 835 2020-09-30 887 2020-12-31 842 2021-03-31 887 2021-06-30 840 2021-09-30 839 2021-12-31 958 2022-03-31 1175 2022-06-30 1047 2022-09-30 929 2022-12-31 1074 2023-03-31 1180 2023-06-30 1119 2023-09-30 995