Quarter US dollars 2004-12-31 102 2005-03-31 202 2005-06-30 197 2005-09-30 253 2005-12-31 536 2006-03-31 500 2006-06-30 446 2006-09-30 426 2006-12-31 431 2007-03-31 284 2007-06-30 189 2007-09-30 291 2007-12-31 177 2008-03-31 2071 2008-06-30 543 2008-09-30 239 2008-12-31 720 2009-03-31 794 2009-06-30 868 2009-09-30 422 2009-12-31 386 2010-03-31 331 2010-06-30 367 2010-09-30 621 2010-12-31 105 2011-03-31 178 2011-06-30 172 2011-09-30 235 2011-12-31 292 2012-03-31 115 2012-06-30 180 2012-09-30 199 2012-12-31 210 2013-03-31 184 2013-06-30 191 2013-09-30 105 2013-12-31 102 2014-03-31 205 2014-06-30 99 2014-09-30 89 2014-12-31 106 2015-03-31 79 2015-06-30 90 2015-09-30 58 2015-12-31 49 2016-03-31 50 2016-06-30 39 2016-09-30 242 2016-12-31 300 2017-03-31 25 2017-06-30 287 2017-09-30 295 2017-12-31 295 2018-03-31 251 2018-06-30 9 2018-09-30 20 2018-12-31 27 2019-03-31 72 2019-06-30 53 2019-09-30 57 2019-12-31 124 2020-03-31 16 2020-06-30 75 2020-09-30 75 2020-12-31 401 2021-03-31 350 2021-06-30 323 2021-09-30 317 2021-12-31 263 2022-03-31 224 2022-06-30 313 2022-09-30 81 2022-12-31 85 2023-03-31 93 2023-06-30 121 2023-09-30 94