Quarter US dollars 2004-12-31 106 2005-03-31 113 2005-06-30 88 2005-09-30 119 2005-12-31 77 2006-03-31 142 2006-06-30 277 2006-09-30 325 2006-12-31 262 2007-03-31 204 2007-06-30 181 2007-09-30 179 2007-12-31 171 2008-03-31 80 2008-06-30 68 2008-09-30 369 2008-12-31 325 2009-03-31 301 2009-06-30 51 2009-09-30 42 2009-12-31 82 2010-03-31 323 2010-06-30 175 2010-09-30 769 2010-12-31 352 2011-03-31 394 2011-06-30 1514 2011-09-30 640 2011-12-31 405 2012-03-31 895 2012-06-30 966 2012-09-30 1030 2012-12-31 566 2013-03-31 305 2013-06-30 270 2013-09-30 277 2013-12-31 279 2014-03-31 215 2014-06-30 315 2014-09-30 349 2014-12-31 237 2015-03-31 371 2015-06-30 245 2015-09-30 165 2015-12-31 113 2016-03-31 135 2016-06-30 200 2016-09-30 186 2016-12-31 225 2017-03-31 301 2017-06-30 369 2017-09-30 326 2017-12-31 407 2018-03-31 258 2018-06-30 214 2018-09-30 310 2018-12-31 638 2019-03-31 870 2019-06-30 743 2019-09-30 743 2019-12-31 999 2020-03-31 940 2020-06-30 962 2020-09-30 958 2020-12-31 524 2021-03-31 200 2021-06-30 153 2021-09-30 117 2021-12-31 186 2022-03-31 476 2022-06-30 344 2022-09-30 362 2022-12-31 418 2023-03-31 127 2023-06-30 227 2023-09-30 217