Quarter US dollars 2004-12-31 217 2005-03-31 159 2005-06-30 285 2005-09-30 152 2005-12-31 136 2006-03-31 66 2006-06-30 102 2006-09-30 144 2006-12-31 100 2007-03-31 104 2007-06-30 165 2007-09-30 242 2007-12-31 846 2008-03-31 509 2008-06-30 374 2008-09-30 882 2008-12-31 1442 2009-03-31 1093 2009-06-30 871 2009-09-30 972 2009-12-31 620 2010-03-31 840 2010-06-30 836 2010-09-30 920 2010-12-31 551 2011-03-31 428 2011-06-30 596 2011-09-30 1232 2011-12-31 966 2012-03-31 655 2012-06-30 1382 2012-09-30 1284 2012-12-31 726 2013-03-31 815 2013-06-30 716 2013-09-30 487 2013-12-31 387 2014-03-31 610 2014-06-30 633 2014-09-30 832 2014-12-31 738 2015-03-31 811 2015-06-30 546 2015-09-30 582 2015-12-31 531 2016-03-31 673 2016-06-30 897 2016-09-30 339 2016-12-31 305 2017-03-31 295 2017-06-30 290 2017-09-30 224 2017-12-31 235 2018-03-31 247 2018-06-30 169 2018-09-30 150 2018-12-31 132 2019-03-31 904 2019-06-30 173 2019-09-30 202 2019-12-31 194 2020-03-31 243 2020-06-30 200 2020-09-30 242 2020-12-31 280 2021-03-31 259 2021-06-30 249 2021-09-30 235 2021-12-31 376 2022-03-31 382 2022-06-30 562 2022-09-30 649 2022-12-31 406 2023-03-31 282 2023-06-30 308 2023-09-30 354