Quarter US dollars 2004-12-31 202 2005-03-31 64 2005-06-30 151 2005-09-30 228 2005-12-31 409 2006-03-31 515 2006-06-30 102 2006-09-30 75 2006-12-31 223 2007-03-31 37 2007-06-30 70 2007-09-30 238 2007-12-31 243 2008-03-31 175 2008-06-30 354 2008-09-30 134 2008-12-31 213 2009-03-31 238 2009-06-30 40 2009-09-30 18 2009-12-31 270 2010-03-31 217 2010-06-30 242 2010-09-30 251 2010-12-31 341 2011-03-31 712 2011-06-30 634 2011-09-30 590 2011-12-31 614 2012-03-31 634 2012-06-30 221 2012-09-30 400 2012-12-31 474 2013-03-31 408 2013-06-30 241 2013-09-30 206 2013-12-31 575 2014-03-31 487 2014-06-30 263 2014-09-30 895 2014-12-31 1444 2015-03-31 1578 2015-06-30 606 2015-09-30 635 2015-12-31 751 2016-03-31 464 2016-06-30 399 2016-09-30 214 2016-12-31 514 2017-03-31 584 2017-06-30 552 2017-09-30 574 2017-12-31 596 2018-03-31 494 2018-06-30 569 2018-09-30 413 2018-12-31 481 2019-03-31 410 2019-06-30 415 2019-09-30 649 2019-12-31 613 2020-03-31 518 2020-06-30 337 2020-09-30 631 2020-12-31 349 2021-03-31 352 2021-06-30 318 2021-09-30 140 2021-12-31 124 2022-03-31 253 2022-06-30 284 2022-09-30 218 2022-12-31 289 2023-03-31 387 2023-06-30 498 2023-09-30 358