Quarter US dollars 2004-12-31 202 2005-03-31 197 2005-06-30 186 2005-09-30 182 2005-12-31 168 2006-03-31 165 2006-06-30 163 2006-09-30 163 2006-12-31 151 2007-03-31 24 2007-06-30 22 2007-09-30 22 2007-12-31 22 2008-03-31 22 2008-06-30 20 2008-09-30 20 2008-12-31 17 2009-03-31 17 2009-06-30 16 2009-09-30 16 2009-12-31 15 2010-03-31 15 2010-06-30 13 2010-09-30 13 2010-12-31 11 2011-03-31 11 2011-06-30 10 2011-09-30 0 2011-12-31 8 2012-03-31 8 2012-06-30 6 2012-09-30 6 2012-12-31 5 2013-03-31 5 2013-06-30 3 2013-09-30 3 2013-12-31 2 2014-03-31 2 2014-06-30 0 2014-09-30 3 2014-12-31 3 2015-03-31 3 2015-06-30 3 2015-09-30 0 2015-12-31 0 2016-03-31 0 2016-06-30 0 2016-09-30 0 2016-12-31 0 2017-03-31 0 2017-06-30 429 2017-09-30 452 2017-12-31 477 2018-03-31 446 2018-06-30 430 2018-09-30 430 2018-12-31 429 2019-03-31 421 2019-06-30 435 2019-09-30 471 2019-12-31 469 2020-03-31 456 2020-06-30 436 2020-09-30 416 2020-12-31 397 2021-03-31 527 2021-06-30 966 2021-09-30 934 2021-12-31 918 2022-03-31 902 2022-06-30 580 2022-09-30 566 2022-12-31 508 2023-03-31 495 2023-06-30 478 2023-09-30 471