Quarter US dollars 2004-12-31 81 2005-03-31 151 2005-06-30 181 2005-09-30 39 2005-12-31 130 2006-03-31 158 2006-06-30 209 2006-09-30 198 2006-12-31 219 2007-03-31 245 2007-06-30 241 2007-09-30 299 2007-12-31 301 2008-03-31 348 2008-06-30 376 2008-09-30 381 2008-12-31 415 2009-03-31 510 2009-06-30 422 2009-09-30 525 2009-12-31 451 2010-03-31 544 2010-06-30 624 2010-09-30 410 2010-12-31 493 2011-03-31 473 2011-06-30 803 2011-09-30 514 2011-12-31 438 2012-03-31 682 2012-06-30 618 2012-09-30 567 2012-12-31 430 2013-03-31 421 2013-06-30 581 2013-09-30 538 2013-12-31 336 2014-03-31 408 2014-06-30 814 2014-09-30 404 2014-12-31 699 2015-03-31 420 2015-06-30 1131 2015-09-30 630 2015-12-31 624 2016-03-31 420 2016-06-30 768 2016-09-30 599 2016-12-31 647 2017-03-31 509 2017-06-30 362 2017-09-30 537 2017-12-31 594 2018-03-31 1224 2018-06-30 1448 2018-09-30 1544 2018-12-31 1581 2019-03-31 2138 2019-06-30 2106 2019-09-30 2142 2019-12-31 1523 2020-03-31 1730 2020-06-30 2438 2020-09-30 2114 2020-12-31 1908 2021-03-31 2592 2021-06-30 2986 2021-09-30 2461 2021-12-31 3124 2022-03-31 2426 2022-06-30 2488 2022-09-30 2793 2022-12-31 3734 2023-03-31 2957 2023-06-30 2504 2023-09-30 2474