Quarter US dollars 2004-12-31 36 2005-03-31 60 2005-06-30 59 2005-09-30 67 2005-12-31 36 2006-03-31 36 2006-06-30 35 2006-09-30 120 2006-12-31 39 2007-03-31 25 2007-06-30 26 2007-09-30 10 2007-12-31 18 2008-03-31 262 2008-06-30 52 2008-09-30 73 2008-12-31 37 2009-03-31 14 2009-06-30 44 2009-09-30 32 2009-12-31 60 2010-03-31 93 2010-06-30 73 2010-09-30 61 2010-12-31 52 2011-03-31 357 2011-06-30 666 2011-09-30 547 2011-12-31 301 2012-03-31 289 2012-06-30 235 2012-09-30 123 2012-12-31 286 2013-03-31 281 2013-06-30 787 2013-09-30 1260 2013-12-31 76 2014-03-31 50 2014-06-30 58 2014-09-30 63 2014-12-31 556 2015-03-31 588 2015-06-30 563 2015-09-30 912 2015-12-31 877 2016-03-31 390 2016-06-30 52 2016-09-30 83 2016-12-31 62 2017-03-31 93 2017-06-30 404 2017-09-30 435 2017-12-31 312 2018-03-31 181 2018-06-30 87 2018-09-30 136 2018-12-31 323 2019-03-31 418 2019-06-30 248 2019-09-30 102 2019-12-31 177 2020-03-31 356 2020-06-30 386 2020-09-30 243 2020-12-31 165 2021-03-31 247 2021-06-30 347 2021-09-30 239 2021-12-31 365 2022-03-31 529 2022-06-30 291 2022-09-30 452 2022-12-31 424 2023-03-31 348 2023-06-30 405 2023-09-30 324