Quarter US dollars 2004-12-31 92 2005-03-31 110 2005-06-30 158 2005-09-30 195 2005-12-31 142 2006-03-31 179 2006-06-30 179 2006-09-30 290 2006-12-31 427 2007-03-31 518 2007-06-30 365 2007-09-30 403 2007-12-31 669 2008-03-31 547 2008-06-30 699 2008-09-30 487 2008-12-31 451 2009-03-31 390 2009-06-30 474 2009-09-30 309 2009-12-31 181 2010-03-31 294 2010-06-30 259 2010-09-30 299 2010-12-31 338 2011-03-31 273 2011-06-30 267 2011-09-30 285 2011-12-31 139 2012-03-31 193 2012-06-30 144 2012-09-30 182 2012-12-31 179 2013-03-31 296 2013-06-30 287 2013-09-30 223 2013-12-31 279 2014-03-31 353 2014-06-30 344 2014-09-30 344 2014-12-31 425 2015-03-31 367 2015-06-30 360 2015-09-30 256 2015-12-31 239 2016-03-31 223 2016-06-30 583 2016-09-30 746 2016-12-31 424 2017-03-31 340 2017-06-30 973 2017-09-30 778 2017-12-31 747 2018-03-31 556 2018-06-30 405 2018-09-30 451 2018-12-31 409 2019-03-31 767 2019-06-30 696 2019-09-30 578 2019-12-31 468 2020-03-31 566 2020-06-30 566 2020-09-30 677 2020-12-31 644 2021-03-31 302 2021-06-30 279 2021-09-30 334 2021-12-31 286 2022-03-31 365 2022-06-30 328 2022-09-30 172 2022-12-31 169 2023-03-31 127 2023-06-30 108 2023-09-30 118