Quarter US dollars 2004-12-31 380559 2005-03-31 401264 2005-06-30 386268 2005-09-30 409185 2005-12-31 442265 2006-03-31 437574 2006-06-30 470230 2006-09-30 453231 2006-12-31 489123 2007-03-31 524354 2007-06-30 555468 2007-09-30 553678 2007-12-31 512501 2008-03-31 508496 2008-06-30 507111 2008-09-30 470662 2008-12-31 406053 2009-03-31 379899 2009-06-30 378589 2009-09-30 351264 2009-12-31 332744 2010-03-31 235807 2010-06-30 255012 2010-09-30 269073 2010-12-31 284473 2011-03-31 286006 2011-06-30 286633 2011-09-30 288757 2011-12-31 293567 2012-03-31 278058 2012-06-30 259029 2012-09-30 297059 2012-12-31 360493 2013-03-31 353324 2013-06-30 358939 2013-09-30 378421 2013-12-31 366672 2014-03-31 393880 2014-06-30 398447 2014-09-30 390469 2014-12-31 396574 2015-03-31 460766 2015-06-30 471673 2015-09-30 411479 2015-12-31 433027 2016-03-31 427346 2016-06-30 397124 2016-09-30 416880 2016-12-31 405995 2017-03-31 417265 2017-06-30 434706 2017-09-30 449331 2017-12-31 536643 2018-03-31 556556 2018-06-30 554605 2018-09-30 593137 2018-12-31 630490 2019-03-31 670642 2019-06-30 677229 2019-09-30 687083 2019-12-31 657274 2020-03-31 632239 2020-06-30 662431 2020-09-30 692712 2020-12-31 693405 2021-03-31 711471 2021-06-30 712009 2021-09-30 702349 2021-12-31 674506 2022-03-31 695052 2022-06-30 722143 2022-09-30 687054 2022-12-31 703079 2023-03-31 718189 2023-06-30 737709 2023-09-30 744198