Quarter US dollars 2004-12-31 131 2005-03-31 176 2005-06-30 188 2005-09-30 76 2005-12-31 84 2006-03-31 61 2006-06-30 94 2006-09-30 62 2006-12-31 84 2007-03-31 51 2007-06-30 259 2007-09-30 210 2007-12-31 313 2008-03-31 451 2008-06-30 697 2008-09-30 759 2008-12-31 707 2009-03-31 547 2009-06-30 501 2009-09-30 510 2009-12-31 520 2010-03-31 699 2010-06-30 612 2010-09-30 942 2010-12-31 982 2011-03-31 1332 2011-06-30 1288 2011-09-30 1452 2011-12-31 959 2012-03-31 1107 2012-06-30 1291 2012-09-30 1190 2012-12-31 1387 2013-03-31 1184 2013-06-30 1177 2013-09-30 892 2013-12-31 516 2014-03-31 425 2014-06-30 340 2014-09-30 718 2014-12-31 665 2015-03-31 377 2015-06-30 322 2015-09-30 477 2015-12-31 439 2016-03-31 417 2016-06-30 592 2016-09-30 534 2016-12-31 383 2017-03-31 448 2017-06-30 590 2017-09-30 983 2017-12-31 494 2018-03-31 682 2018-06-30 462 2018-09-30 331 2018-12-31 540 2019-03-31 481 2019-06-30 395 2019-09-30 425 2019-12-31 505 2020-03-31 491 2020-06-30 329 2020-09-30 458 2020-12-31 374 2021-03-31 273 2021-06-30 379 2021-09-30 487 2021-12-31 249 2022-03-31 154 2022-06-30 296 2022-09-30 700 2022-12-31 232 2023-03-31 650 2023-06-30 434 2023-09-30 262