Quarter US dollars 2004-12-31 90 2005-03-31 234 2005-06-30 912 2005-09-30 80 2005-12-31 153 2006-03-31 316 2006-06-30 599 2006-09-30 656 2006-12-31 667 2007-03-31 628 2007-06-30 734 2007-09-30 898 2007-12-31 848 2008-03-31 1898 2008-06-30 2123 2008-09-30 1762 2008-12-31 2424 2009-03-31 1498 2009-06-30 996 2009-09-30 1030 2009-12-31 1195 2010-03-31 1178 2010-06-30 1255 2010-09-30 1459 2010-12-31 1468 2011-03-31 1106 2011-06-30 1223 2011-09-30 1620 2011-12-31 954 2012-03-31 1239 2012-06-30 896 2012-09-30 790 2012-12-31 624 2013-03-31 577 2013-06-30 637 2013-09-30 526 2013-12-31 514 2014-03-31 540 2014-06-30 542 2014-09-30 699 2014-12-31 768 2015-03-31 698 2015-06-30 642 2015-09-30 674 2015-12-31 510 2016-03-31 610 2016-06-30 446 2016-09-30 411 2016-12-31 308 2017-03-31 330 2017-06-30 201 2017-09-30 236 2017-12-31 434 2018-03-31 591 2018-06-30 618 2018-09-30 394 2018-12-31 312 2019-03-31 464 2019-06-30 597 2019-09-30 509 2019-12-31 705 2020-03-31 680 2020-06-30 460 2020-09-30 258 2020-12-31 407 2021-03-31 252 2021-06-30 268 2021-09-30 256 2021-12-31 589 2022-03-31 715 2022-06-30 1110 2022-09-30 1185 2022-12-31 1032 2023-03-31 1311 2023-06-30 845 2023-09-30 1099