Quarter US dollars 2004-12-31 213 2005-03-31 225 2005-06-30 231 2005-09-30 209 2005-12-31 93 2006-03-31 116 2006-06-30 429 2006-09-30 340 2006-12-31 286 2007-03-31 369 2007-06-30 855 2007-09-30 163 2007-12-31 119 2008-03-31 121 2008-06-30 211 2008-09-30 549 2008-12-31 118 2009-03-31 244 2009-06-30 260 2009-09-30 273 2009-12-31 321 2010-03-31 302 2010-06-30 479 2010-09-30 824 2010-12-31 661 2011-03-31 712 2011-06-30 811 2011-09-30 726 2011-12-31 456 2012-03-31 382 2012-06-30 795 2012-09-30 480 2012-12-31 409 2013-03-31 604 2013-06-30 818 2013-09-30 604 2013-12-31 807 2014-03-31 870 2014-06-30 802 2014-09-30 877 2014-12-31 860 2015-03-31 567 2015-06-30 783 2015-09-30 1060 2015-12-31 430 2016-03-31 451 2016-06-30 485 2016-09-30 359 2016-12-31 471 2017-03-31 540 2017-06-30 803 2017-09-30 1277 2017-12-31 620 2018-03-31 1361 2018-06-30 1716 2018-09-30 1103 2018-12-31 831 2019-03-31 564 2019-06-30 955 2019-09-30 1015 2019-12-31 624 2020-03-31 862 2020-06-30 1394 2020-09-30 2651 2020-12-31 2857 2021-03-31 3547 2021-06-30 2047 2021-09-30 1454 2021-12-31 1499 2022-03-31 1581 2022-06-30 1148 2022-09-30 1592 2022-12-31 1509 2023-03-31 1311 2023-06-30 2358 2023-09-30 2199