Quarter US dollars 2004-12-31 524 2005-03-31 556 2005-06-30 574 2005-09-30 562 2005-12-31 561 2006-03-31 569 2006-06-30 113 2006-09-30 105 2006-12-31 155 2007-03-31 571 2007-06-30 584 2007-09-30 577 2007-12-31 563 2008-03-31 133 2008-06-30 98 2008-09-30 241 2008-12-31 219 2009-03-31 60 2009-06-30 69 2009-09-30 553 2009-12-31 651 2010-03-31 710 2010-06-30 610 2010-09-30 635 2010-12-31 146 2011-03-31 367 2011-06-30 21 2011-09-30 689 2011-12-31 581 2012-03-31 551 2012-06-30 598 2012-09-30 625 2012-12-31 470 2013-03-31 537 2013-06-30 441 2013-09-30 24 2013-12-31 473 2014-03-31 492 2014-06-30 511 2014-09-30 452 2014-12-31 509 2015-03-31 460 2015-06-30 461 2015-09-30 532 2015-12-31 80 2016-03-31 81 2016-06-30 1 2016-09-30 81 2016-12-31 1 2017-03-31 1 2017-06-30 1 2017-09-30 0 2017-12-31 0 2018-03-31 0 2018-06-30 1 2018-09-30 1 2018-12-31 476 2019-03-31 173 2019-06-30 5 2019-09-30 6 2019-12-31 450 2020-03-31 1 2020-06-30 452 2020-09-30 452 2020-12-31 450 2021-03-31 461 2021-06-30 460 2021-09-30 489 2021-12-31 474 2022-03-31 545 2022-06-30 0 2022-09-30 0 2022-12-31 557 2023-03-31 661 2023-06-30 595 2023-09-30 532