Quarter US dollars 2004-12-31 655 2005-03-31 616 2005-06-30 577 2005-09-30 584 2005-12-31 592 2006-03-31 609 2006-06-30 588 2006-09-30 596 2006-12-31 583 2007-03-31 618 2007-06-30 684 2007-09-30 1224 2007-12-31 673 2008-03-31 719 2008-06-30 726 2008-09-30 798 2008-12-31 788 2009-03-31 851 2009-06-30 879 2009-09-30 1004 2009-12-31 1001 2010-03-31 983 2010-06-30 993 2010-09-30 1030 2010-12-31 1022 2011-03-31 1072 2011-06-30 1137 2011-09-30 1148 2011-12-31 1054 2012-03-31 1104 2012-06-30 1209 2012-09-30 1140 2013-03-31 1202 2014-03-31 992 2014-06-30 1024 2014-09-30 984 2014-12-31 949 2015-03-31 883 2015-06-30 893 2015-09-30 883 2015-12-31 811 2016-03-31 794 2016-06-30 763 2016-09-30 718 2016-12-31 739 2017-03-31 763 2017-06-30 13 2017-09-30 3 2017-12-31 8 2018-03-31 15 2018-06-30 17 2018-09-30 25 2018-12-31 19 2019-03-31 10 2019-06-30 14 2019-09-30 12 2019-12-31 11 2020-03-31 1 2020-06-30 0 2020-09-30 0 2020-12-31 0 2021-03-31 0 2021-06-30 0 2021-09-30 0 2021-12-31 0 2022-03-31 0 2022-06-30 0 2022-09-30 0 2022-12-31 0 2023-03-31 0 2023-06-30 0 2023-09-30 0