Quarter US dollars 2004-12-31 56 2005-03-31 66 2005-06-30 59 2005-09-30 122 2005-12-31 51 2006-03-31 49 2006-06-30 31 2006-09-30 390 2006-12-31 63 2007-03-31 63 2007-06-30 112 2007-09-30 120 2007-12-31 123 2008-03-31 294 2008-06-30 334 2008-09-30 444 2008-12-31 185 2009-03-31 278 2009-06-30 746 2009-09-30 198 2009-12-31 142 2010-03-31 475 2010-06-30 75 2010-09-30 102 2010-12-31 147 2011-03-31 175 2011-06-30 96 2011-09-30 142 2011-12-31 186 2012-03-31 245 2012-06-30 337 2012-09-30 212 2012-12-31 380 2013-03-31 433 2013-06-30 288 2013-09-30 483 2013-12-31 469 2014-03-31 315 2014-06-30 243 2014-09-30 279 2014-12-31 840 2015-03-31 665 2015-06-30 179 2015-09-30 894 2015-12-31 456 2016-03-31 592 2016-06-30 663 2016-09-30 673 2016-12-31 672 2017-03-31 490 2017-06-30 473 2017-09-30 448 2017-12-31 609 2018-03-31 469 2018-06-30 444 2018-09-30 546 2018-12-31 336 2019-03-31 1491 2019-06-30 1320 2019-09-30 1408 2019-12-31 1946 2020-03-31 1018 2020-06-30 1032 2020-09-30 1480 2020-12-31 783 2021-03-31 3001 2021-06-30 3321 2021-09-30 3558 2021-12-31 3426 2022-03-31 1119 2022-06-30 1281 2022-09-30 497 2022-12-31 635 2023-03-31 689 2023-06-30 586 2023-09-30 420