Quarter US dollars 2004-12-31 90 2005-03-31 83 2005-06-30 120 2005-09-30 140 2005-12-31 123 2006-03-31 137 2006-06-30 203 2006-09-30 220 2006-12-31 411 2007-03-31 543 2007-06-30 381 2007-09-30 638 2007-12-31 701 2008-03-31 662 2008-06-30 838 2008-09-30 773 2008-12-31 530 2009-03-31 509 2009-06-30 446 2009-09-30 331 2009-12-31 428 2010-03-31 220 2010-06-30 153 2010-09-30 251 2010-12-31 429 2011-03-31 223 2011-06-30 180 2011-09-30 204 2011-12-31 318 2012-03-31 267 2012-06-30 268 2012-09-30 438 2012-12-31 624 2013-03-31 732 2013-06-30 784 2013-09-30 897 2013-12-31 322 2014-03-31 822 2014-06-30 754 2014-09-30 752 2014-12-31 548 2015-03-31 460 2015-06-30 329 2015-09-30 147 2015-12-31 122 2016-03-31 105 2016-06-30 105 2016-09-30 144 2016-12-31 117 2017-03-31 120 2017-06-30 152 2017-09-30 134 2017-12-31 109 2018-03-31 86 2018-06-30 78 2018-09-30 141 2018-12-31 78 2019-03-31 48 2019-06-30 78 2019-09-30 87 2019-12-31 92 2020-03-31 63 2020-06-30 114 2020-09-30 53 2020-12-31 64 2021-03-31 117 2021-06-30 151 2021-09-30 88 2021-12-31 164 2022-03-31 80 2022-06-30 78 2022-09-30 175 2022-12-31 131 2023-03-31 185 2023-06-30 231 2023-09-30 220