Quarter US dollars 2004-12-31 58 2005-03-31 30 2005-06-30 38 2005-09-30 60 2005-12-31 60 2006-03-31 73 2006-06-30 80 2006-09-30 95 2006-12-31 114 2007-03-31 451 2007-06-30 572 2007-09-30 605 2007-12-31 711 2008-03-31 1310 2008-06-30 824 2008-09-30 743 2008-12-31 365 2009-03-31 408 2009-06-30 216 2009-09-30 269 2009-12-31 389 2010-03-31 426 2010-06-30 613 2010-09-30 446 2010-12-31 551 2011-03-31 587 2011-06-30 792 2011-09-30 743 2011-12-31 792 2012-03-31 698 2012-06-30 853 2012-09-30 681 2012-12-31 752 2013-03-31 638 2013-06-30 620 2013-09-30 667 2013-12-31 681 2014-03-31 1032 2014-06-30 1130 2014-09-30 1459 2014-12-31 1125 2015-03-31 1115 2015-06-30 1092 2015-09-30 626 2015-12-31 476 2016-03-31 554 2016-06-30 641 2016-09-30 1046 2016-12-31 1065 2017-03-31 1112 2017-06-30 1042 2017-09-30 1057 2017-12-31 1119 2018-03-31 1078 2018-06-30 1046 2018-09-30 1063 2018-12-31 841 2019-03-31 837 2019-06-30 788 2019-09-30 726 2019-12-31 696 2020-03-31 894 2020-06-30 507 2020-09-30 607 2020-12-31 564 2021-03-31 905 2021-06-30 1546 2021-09-30 1837 2021-12-31 899 2022-03-31 1050 2022-06-30 1322 2022-09-30 1351 2022-12-31 1242 2023-03-31 1087 2023-06-30 824 2023-09-30 739