Quarter US dollars 2004-12-31 463 2005-03-31 448 2005-06-30 502 2005-09-30 706 2005-12-31 611 2006-03-31 652 2006-06-30 706 2006-09-30 740 2006-12-31 834 2007-03-31 910 2007-06-30 963 2007-09-30 1092 2007-12-31 1133 2008-03-31 1119 2008-06-30 1333 2008-09-30 1281 2008-12-31 1359 2009-03-31 1240 2009-06-30 1235 2009-09-30 1199 2009-12-31 323 2010-03-31 271 2010-06-30 361 2010-09-30 298 2010-12-31 546 2011-03-31 595 2011-06-30 565 2011-09-30 833 2011-12-31 1034 2012-03-31 999 2012-06-30 1085 2012-09-30 770 2012-12-31 1148 2013-03-31 1328 2013-06-30 960 2013-09-30 921 2013-12-31 820 2014-03-31 924 2014-06-30 1089 2014-09-30 1123 2014-12-31 977 2015-03-31 707 2015-06-30 554 2015-09-30 538 2015-12-31 751 2016-03-31 663 2016-06-30 858 2016-09-30 725 2016-12-31 861 2017-03-31 778 2017-06-30 978 2017-09-30 824 2017-12-31 789 2018-03-31 791 2018-06-30 846 2018-09-30 1318 2018-12-31 1646 2019-03-31 859 2019-06-30 1132 2019-09-30 1153 2019-12-31 620 2020-03-31 583 2020-06-30 966 2020-09-30 911 2020-12-31 1129 2021-03-31 1065 2021-06-30 1368 2021-09-30 817 2021-12-31 919 2022-03-31 1017 2022-06-30 853 2022-09-30 1246 2022-12-31 1067 2023-03-31 1128 2023-06-30 702 2023-09-30 771