Quarter US dollars 2004-12-31 344 2005-03-31 144 2005-06-30 362 2005-09-30 677 2005-12-31 280 2006-03-31 442 2006-06-30 179 2006-09-30 82 2006-12-31 127 2007-03-31 328 2007-06-30 233 2007-09-30 599 2007-12-31 581 2008-03-31 328 2008-06-30 328 2008-09-30 378 2008-12-31 634 2009-03-31 645 2009-06-30 183 2009-09-30 672 2009-12-31 656 2010-03-31 340 2010-06-30 510 2010-09-30 430 2010-12-31 1029 2011-03-31 1031 2011-06-30 1315 2011-09-30 1187 2011-12-31 1184 2012-03-31 1310 2012-06-30 1172 2012-09-30 575 2012-12-31 543 2013-03-31 560 2013-06-30 478 2013-09-30 1619 2013-12-31 1719 2014-03-31 2313 2014-06-30 2371 2014-09-30 1989 2014-12-31 1266 2015-03-31 1513 2015-06-30 2043 2015-09-30 1734 2015-12-31 1432 2016-03-31 1313 2016-06-30 322 2016-09-30 455 2016-12-31 453 2017-03-31 1023 2017-06-30 995 2017-09-30 898 2017-12-31 550 2018-03-31 801 2018-06-30 990 2018-09-30 389 2018-12-31 631 2019-03-31 882 2019-06-30 1441 2019-09-30 1535 2019-12-31 2276 2020-03-31 2912 2020-06-30 2042 2020-09-30 1663 2020-12-31 1295 2021-03-31 1520 2021-06-30 1727 2021-09-30 2113 2021-12-31 1441 2022-03-31 3417 2022-06-30 4902 2022-09-30 2361 2022-12-31 1555 2023-03-31 1008 2023-06-30 1007 2023-09-30 3005