Quarter US dollars 2004-12-31 215 2005-03-31 185 2005-06-30 156 2005-09-30 170 2005-12-31 179 2006-03-31 217 2006-06-30 168 2006-09-30 267 2006-12-31 389 2007-03-31 194 2007-06-30 496 2007-09-30 589 2007-12-31 532 2008-03-31 642 2008-06-30 617 2008-09-30 556 2008-12-31 395 2009-03-31 403 2009-06-30 529 2009-09-30 638 2009-12-31 530 2010-03-31 485 2010-06-30 494 2010-09-30 518 2010-12-31 546 2011-03-31 553 2011-06-30 665 2011-09-30 562 2011-12-31 499 2012-03-31 566 2012-06-30 489 2012-09-30 515 2012-12-31 530 2013-03-31 408 2013-06-30 446 2013-09-30 470 2013-12-31 408 2014-03-31 562 2014-06-30 5 2014-09-30 2 2014-12-31 16 2015-03-31 15 2015-06-30 0 2015-09-30 388 2015-12-31 369 2016-03-31 388 2016-06-30 416 2016-09-30 414 2016-12-31 522 2017-03-31 398 2017-06-30 592 2017-09-30 692 2017-12-31 535 2018-03-31 528 2018-06-30 537 2018-09-30 556 2018-12-31 592 2019-03-31 640 2019-06-30 145 2019-09-30 145 2019-12-31 172 2020-03-31 346 2020-06-30 64 2020-09-30 265 2020-12-31 269 2021-03-31 237 2021-06-30 282 2021-09-30 597 2021-12-31 543 2022-03-31 707 2022-06-30 619 2022-09-30 775 2022-12-31 834 2023-03-31 665 2023-06-30 711 2023-09-30 809