Quarter US dollars 2004-12-31 134 2005-03-31 115 2005-06-30 111 2005-09-30 122 2005-12-31 132 2006-03-31 134 2006-06-30 122 2006-09-30 161 2006-12-31 127 2007-03-31 145 2007-06-30 193 2007-09-30 151 2007-12-31 285 2008-03-31 260 2008-06-30 291 2008-09-30 180 2008-12-31 253 2009-03-31 351 2009-06-30 392 2009-09-30 433 2009-12-31 483 2010-03-31 417 2010-06-30 1752 2010-09-30 781 2010-12-31 1072 2011-03-31 1101 2011-06-30 1177 2011-09-30 1276 2011-12-31 962 2012-03-31 724 2012-06-30 631 2012-09-30 880 2012-12-31 698 2013-03-31 572 2013-06-30 619 2013-09-30 928 2013-12-31 446 2014-03-31 477 2014-06-30 506 2014-09-30 478 2014-12-31 426 2015-03-31 686 2015-06-30 417 2015-09-30 335 2015-12-31 344 2016-03-31 354 2016-06-30 325 2016-09-30 292 2016-12-31 326 2017-03-31 393 2017-06-30 2610 2017-09-30 2334 2017-12-31 2163 2018-03-31 2266 2018-06-30 2314 2018-09-30 2264 2018-12-31 1941 2019-03-31 2120 2019-06-30 2066 2019-09-30 2027 2019-12-31 1943 2020-03-31 2118 2020-06-30 1668 2020-09-30 1489 2020-12-31 1744 2021-03-31 2016 2021-06-30 2112 2021-09-30 2054 2021-12-31 2101 2022-03-31 2151 2022-06-30 1853 2022-09-30 1453 2022-12-31 1331 2023-03-31 1038 2023-06-30 961 2023-09-30 1032