Quarter US dollars 2004-12-31 73 2005-03-31 70 2005-06-30 65 2005-09-30 74 2005-12-31 84 2006-03-31 85 2006-06-30 92 2006-09-30 125 2006-12-31 100 2007-03-31 102 2007-06-30 104 2007-09-30 112 2007-12-31 123 2008-03-31 215 2008-06-30 169 2008-09-30 162 2008-12-31 231 2009-03-31 107 2009-06-30 119 2009-09-30 115 2009-12-31 191 2010-03-31 211 2010-06-30 84 2010-09-30 101 2010-12-31 146 2011-03-31 157 2011-06-30 220 2011-09-30 106 2011-12-31 102 2012-03-31 197 2012-06-30 47 2012-09-30 11 2012-12-31 11 2013-03-31 9 2013-06-30 6 2013-09-30 6 2013-12-31 13 2014-03-31 5 2014-06-30 9 2014-09-30 447 2014-12-31 428 2015-03-31 405 2015-06-30 448 2015-09-30 3 2015-12-31 139 2016-03-31 -1 2016-06-30 0 2016-09-30 4 2016-12-31 5 2017-03-31 5 2017-06-30 1031 2017-09-30 1088 2017-12-31 1081 2018-03-31 1088 2018-06-30 684 2018-09-30 528 2018-12-31 610 2019-03-31 706 2019-06-30 695 2019-09-30 777 2019-12-31 840 2020-03-31 569 2020-06-30 564 2020-09-30 570 2020-12-31 710 2021-03-31 824 2021-06-30 760 2021-09-30 769 2021-12-31 775 2022-03-31 654 2022-06-30 585 2022-09-30 544 2022-12-31 390 2023-03-31 607 2023-06-30 922 2023-09-30 333