Quarter US dollars 2004-12-31 259 2005-03-31 144 2005-06-30 109 2005-09-30 180 2005-12-31 154 2006-03-31 137 2006-06-30 152 2006-09-30 192 2006-12-31 303 2007-03-31 430 2007-06-30 315 2007-09-30 189 2007-12-31 261 2008-03-31 386 2008-06-30 159 2008-09-30 192 2008-12-31 184 2009-03-31 106 2009-06-30 204 2009-09-30 262 2009-12-31 131 2010-03-31 223 2010-06-30 887 2010-09-30 1076 2010-12-31 676 2011-03-31 673 2011-06-30 803 2011-09-30 1179 2011-12-31 1081 2012-03-31 906 2012-06-30 874 2012-09-30 1140 2012-12-31 170 2013-03-31 123 2013-06-30 761 2013-09-30 479 2013-12-31 192 2014-03-31 173 2014-06-30 154 2014-09-30 360 2014-12-31 148 2015-03-31 189 2015-06-30 352 2015-09-30 254 2015-12-31 282 2016-03-31 200 2016-06-30 58 2016-09-30 199 2016-12-31 293 2017-03-31 100 2017-06-30 81 2017-09-30 174 2017-12-31 138 2018-03-31 514 2018-06-30 285 2018-09-30 292 2018-12-31 241 2019-03-31 666 2019-06-30 678 2019-09-30 363 2019-12-31 211 2020-03-31 279 2020-06-30 321 2020-09-30 363 2020-12-31 506 2021-03-31 288 2021-06-30 162 2021-09-30 166 2021-12-31 159 2022-03-31 125 2022-06-30 121 2022-09-30 406 2022-12-31 152 2023-03-31 147 2023-06-30 377 2023-09-30 387