Quarter US dollars 2004-12-31 298 2005-03-31 319 2005-06-30 326 2005-09-30 405 2005-12-31 213 2006-03-31 191 2006-06-30 213 2006-09-30 247 2006-12-31 384 2007-03-31 563 2007-06-30 518 2007-09-30 862 2007-12-31 1011 2008-03-31 1095 2008-06-30 734 2008-09-30 1055 2008-12-31 1139 2009-03-31 1079 2009-06-30 1051 2009-09-30 1278 2009-12-31 964 2010-03-31 555 2010-06-30 581 2010-09-30 627 2010-12-31 515 2011-03-31 521 2011-06-30 567 2011-09-30 525 2011-12-31 424 2012-03-31 1234 2012-06-30 544 2012-09-30 893 2012-12-31 812 2013-03-31 252 2013-06-30 369 2013-09-30 415 2013-12-31 374 2014-03-31 17 2014-06-30 21 2014-09-30 18 2014-12-31 23 2015-03-31 36 2015-06-30 58 2015-09-30 71 2015-12-31 21 2016-03-31 66 2016-06-30 62 2016-09-30 35 2016-12-31 17 2017-03-31 23 2017-06-30 31 2017-09-30 55 2017-12-31 50 2018-03-31 42 2018-06-30 0 2018-09-30 26 2018-12-31 52 2019-03-31 14 2019-06-30 25 2019-09-30 14 2019-12-31 12 2020-03-31 12 2020-06-30 26 2020-09-30 26 2020-12-31 44 2021-03-31 39 2021-06-30 37 2021-09-30 35 2021-12-31 30 2022-03-31 63 2022-06-30 89 2022-09-30 104 2022-12-31 109 2023-03-31 88 2023-06-30 126 2023-09-30 189