Quarter US dollars 2004-12-31 60 2005-03-31 64 2005-06-30 84 2005-09-30 99 2005-12-31 77 2006-03-31 90 2006-06-30 96 2006-09-30 90 2006-12-31 100 2007-03-31 167 2007-06-30 100 2007-09-30 263 2007-12-31 265 2008-03-31 296 2008-06-30 310 2008-09-30 257 2008-12-31 269 2009-03-31 241 2009-06-30 316 2009-09-30 321 2009-12-31 203 2010-03-31 278 2010-06-30 263 2010-09-30 263 2010-12-31 313 2011-03-31 250 2011-06-30 223 2011-09-30 488 2011-12-31 345 2012-03-31 451 2012-06-30 391 2012-09-30 664 2012-12-31 634 2013-03-31 717 2013-06-30 645 2013-09-30 282 2013-12-31 263 2014-03-31 1014 2014-06-30 1113 2014-09-30 1216 2014-12-31 1270 2015-03-31 1151 2015-06-30 1109 2015-09-30 719 2015-12-31 614 2016-03-31 697 2016-06-30 615 2016-09-30 656 2016-12-31 586 2017-03-31 490 2017-06-30 252 2017-09-30 252 2017-12-31 390 2018-03-31 1357 2018-06-30 1368 2018-09-30 1360 2018-12-31 243 2019-03-31 225 2019-06-30 186 2019-09-30 235 2019-12-31 244 2020-03-31 221 2020-06-30 514 2020-09-30 597 2020-12-31 231 2021-03-31 468 2021-06-30 608 2021-09-30 615 2021-12-31 819 2022-03-31 679 2022-06-30 587 2022-09-30 766 2022-12-31 491 2023-03-31 296 2023-06-30 755 2023-09-30 1478