Quarter US dollars 2004-12-31 182 2005-03-31 151 2005-06-30 167 2005-09-30 187 2005-12-31 112 2006-03-31 149 2006-06-30 270 2006-09-30 293 2006-12-31 540 2007-03-31 482 2007-06-30 750 2007-09-30 664 2007-12-31 890 2008-03-31 237 2008-06-30 352 2008-09-30 438 2008-12-31 263 2009-03-31 242 2009-06-30 311 2009-09-30 336 2009-12-31 310 2010-03-31 96 2010-06-30 289 2010-09-30 394 2010-12-31 445 2011-03-31 297 2011-06-30 358 2011-09-30 344 2011-12-31 332 2012-03-31 272 2012-06-30 532 2012-09-30 407 2012-12-31 310 2013-03-31 346 2013-06-30 616 2013-09-30 335 2013-12-31 443 2014-03-31 515 2014-06-30 388 2014-09-30 436 2014-12-31 401 2015-03-31 401 2015-06-30 366 2015-09-30 401 2015-12-31 479 2016-03-31 434 2016-06-30 675 2016-09-30 618 2016-12-31 485 2017-03-31 589 2017-06-30 651 2017-09-30 577 2017-12-31 638 2018-03-31 804 2018-06-30 698 2018-09-30 1476 2018-12-31 944 2019-03-31 937 2019-06-30 1457 2019-09-30 1481 2019-12-31 1849 2020-03-31 1838 2020-06-30 1376 2020-09-30 1608 2020-12-31 1630 2021-03-31 1338 2021-06-30 1059 2021-09-30 677 2021-12-31 830 2022-03-31 646 2022-06-30 952 2022-09-30 627 2022-12-31 835 2023-03-31 756 2023-06-30 415 2023-09-30 676