Quarter US dollars 2004-12-31 422 2005-03-31 537 2005-06-30 559 2005-09-30 612 2005-12-31 633 2006-03-31 626 2006-06-30 782 2006-09-30 801 2006-12-31 802 2007-03-31 763 2007-06-30 981 2007-09-30 1082 2007-12-31 1139 2008-03-31 1503 2008-06-30 1622 2008-09-30 1308 2008-12-31 752 2009-03-31 1177 2009-06-30 530 2009-09-30 1009 2009-12-31 991 2010-03-31 640 2010-06-30 1173 2010-09-30 800 2010-12-31 585 2011-03-31 784 2011-06-30 867 2011-09-30 1101 2011-12-31 844 2012-03-31 873 2012-06-30 1032 2012-09-30 906 2012-12-31 1232 2013-03-31 1154 2013-06-30 1036 2013-09-30 580 2013-12-31 545 2014-03-31 432 2014-06-30 419 2014-09-30 449 2014-12-31 418 2015-03-31 462 2015-06-30 385 2015-09-30 315 2015-12-31 1274 2016-03-31 1212 2016-06-30 1286 2016-09-30 799 2016-12-31 643 2017-03-31 728 2017-06-30 1437 2017-09-30 1975 2017-12-31 1867 2018-03-31 2185 2018-06-30 1716 2018-09-30 1527 2018-12-31 1654 2019-03-31 1811 2019-06-30 1577 2019-09-30 1544 2019-12-31 1206 2020-03-31 1223 2020-06-30 1296 2020-09-30 1316 2020-12-31 928 2021-03-31 1542 2021-06-30 1711 2021-09-30 1880 2021-12-31 2446 2022-03-31 2443 2022-06-30 2676 2022-09-30 2937 2022-12-31 3240 2023-03-31 2815 2023-06-30 2183 2023-09-30 2041