Quarter US dollars 2004-12-31 23 2005-03-31 40 2005-06-30 41 2005-09-30 41 2005-12-31 48 2006-03-31 52 2006-06-30 54 2006-09-30 32 2006-12-31 22 2007-03-31 25 2007-06-30 22 2007-09-30 29 2007-12-31 22 2008-03-31 147 2008-06-30 92 2008-09-30 84 2008-12-31 62 2009-03-31 26 2009-06-30 26 2009-09-30 24 2009-12-31 82 2010-03-31 83 2010-06-30 115 2010-09-30 263 2010-12-31 307 2011-03-31 237 2011-06-30 324 2011-09-30 178 2011-12-31 233 2012-03-31 336 2012-06-30 306 2012-09-30 359 2012-12-31 382 2013-03-31 386 2013-06-30 228 2013-09-30 342 2013-12-31 345 2014-03-31 337 2014-06-30 265 2014-09-30 256 2014-12-31 367 2015-03-31 292 2015-06-30 278 2015-09-30 264 2015-12-31 218 2016-03-31 178 2016-06-30 173 2016-09-30 160 2016-12-31 197 2017-03-31 163 2017-06-30 321 2017-09-30 431 2017-12-31 165 2018-03-31 178 2018-06-30 147 2018-09-30 190 2018-12-31 194 2019-03-31 212 2019-06-30 121 2019-09-30 97 2019-12-31 125 2020-03-31 213 2020-06-30 256 2020-09-30 257 2020-12-31 259 2021-03-31 120 2021-06-30 134 2021-09-30 248 2021-12-31 78 2022-03-31 32 2022-06-30 30 2022-09-30 591 2022-12-31 361 2023-03-31 383 2023-06-30 374 2023-09-30 199