Quarter US dollars 2004-12-31 236 2005-03-31 229 2005-06-30 129 2005-09-30 104 2005-12-31 137 2006-03-31 128 2006-06-30 163 2006-09-30 248 2006-12-31 346 2007-03-31 375 2007-06-30 795 2007-09-30 660 2007-12-31 794 2008-03-31 475 2008-06-30 774 2008-09-30 472 2008-12-31 601 2009-03-31 401 2009-06-30 1141 2009-09-30 654 2009-12-31 1282 2010-03-31 1852 2010-06-30 1299 2010-09-30 1446 2010-12-31 1249 2011-03-31 1690 2011-06-30 989 2011-09-30 1273 2011-12-31 1614 2012-03-31 1755 2012-06-30 1269 2012-09-30 793 2012-12-31 1086 2013-03-31 1093 2013-06-30 557 2013-09-30 844 2013-12-31 845 2014-03-31 852 2014-06-30 1103 2014-09-30 739 2014-12-31 821 2015-03-31 831 2015-06-30 945 2015-09-30 956 2015-12-31 413 2016-03-31 1234 2016-06-30 494 2016-09-30 452 2016-12-31 240 2017-03-31 278 2017-06-30 416 2017-09-30 1028 2017-12-31 747 2018-03-31 867 2018-06-30 625 2018-09-30 750 2018-12-31 720 2019-03-31 822 2019-06-30 765 2019-09-30 420 2019-12-31 637 2020-03-31 731 2020-06-30 659 2020-09-30 458 2020-12-31 549 2021-03-31 654 2021-06-30 636 2021-09-30 619 2021-12-31 414 2022-03-31 483 2022-06-30 518 2022-09-30 629 2022-12-31 520 2023-03-31 499 2023-06-30 496 2023-09-30 975