Quarter US dollars 2004-12-31 259 2005-03-31 272 2005-06-30 258 2005-09-30 262 2005-12-31 251 2006-03-31 252 2006-06-30 266 2006-09-30 275 2006-12-31 288 2007-03-31 296 2007-06-30 295 2007-09-30 308 2007-12-31 219 2008-03-31 368 2008-06-30 386 2008-09-30 262 2008-12-31 231 2009-03-31 206 2009-06-30 240 2009-09-30 249 2009-12-31 254 2010-03-31 226 2010-06-30 263 2010-09-30 268 2010-12-31 280 2011-03-31 266 2011-06-30 275 2011-09-30 313 2011-12-31 317 2012-03-31 331 2012-06-30 307 2012-09-30 268 2012-12-31 254 2013-03-31 249 2013-06-30 244 2013-09-30 243 2013-12-31 241 2014-03-31 255 2014-06-30 255 2014-09-30 261 2014-12-31 106 2015-03-31 252 2015-06-30 308 2015-09-30 304 2015-12-31 305 2016-03-31 316 2016-06-30 290 2016-09-30 277 2016-12-31 281 2017-03-31 370 2017-06-30 611 2017-09-30 708 2017-12-31 700 2018-03-31 706 2018-06-30 696 2018-09-30 668 2018-12-31 737 2019-03-31 704 2019-06-30 789 2019-09-30 781 2019-12-31 777 2020-03-31 742 2020-06-30 803 2020-09-30 809 2020-12-31 871 2021-03-31 991 2021-06-30 985 2021-09-30 1084 2021-12-31 1113 2022-03-31 1070 2022-06-30 1120 2022-09-30 1213 2022-12-31 1060 2023-03-31 1104 2023-06-30 1099 2023-09-30 1133