Quarter US dollars 2004-12-31 296 2005-03-31 23 2005-06-30 54 2008-03-31 95 2008-06-30 88 2008-09-30 73 2008-12-31 59 2009-03-31 42 2009-06-30 87 2009-09-30 94 2009-12-31 11 2010-03-31 70 2010-06-30 115 2010-09-30 128 2010-12-31 291 2011-03-31 125 2011-06-30 125 2011-09-30 103 2011-12-31 39 2012-03-31 58 2012-06-30 154 2012-09-30 182 2012-12-31 264 2013-03-31 455 2013-06-30 493 2013-09-30 308 2013-12-31 190 2014-03-31 7 2014-06-30 31 2014-09-30 39 2014-12-31 442 2015-03-31 362 2015-06-30 577 2015-09-30 68 2015-12-31 41 2016-03-31 37 2016-06-30 28 2016-09-30 39 2016-12-31 64 2017-03-31 74 2017-06-30 121 2017-09-30 93 2017-12-31 97 2018-03-31 51 2018-06-30 55 2018-09-30 34 2018-12-31 10 2019-03-31 17 2019-06-30 10 2019-09-30 1 2019-12-31 392 2020-03-31 355 2020-06-30 335 2020-09-30 330 2020-12-31 319 2021-03-31 385 2021-06-30 75 2021-09-30 112 2021-12-31 158 2022-03-31 116 2022-06-30 177 2022-09-30 242 2022-12-31 280 2023-03-31 470 2023-06-30 617 2023-09-30 716