Quarter US dollars 2004-12-31 307 2005-03-31 301 2005-06-30 307 2005-09-30 377 2005-12-31 348 2006-03-31 378 2006-06-30 320 2006-09-30 357 2006-12-31 182 2007-03-31 212 2007-06-30 161 2007-09-30 381 2007-12-31 1005 2008-03-31 1157 2008-06-30 454 2008-09-30 503 2008-12-31 548 2009-03-31 580 2009-06-30 305 2009-09-30 317 2009-12-31 276 2010-03-31 362 2010-06-30 -768 2010-09-30 -859 2010-12-31 -834 2011-03-31 -755 2011-06-30 -287 2011-09-30 -246 2011-12-31 -60 2012-03-31 117 2012-06-30 221 2012-09-30 144 2012-12-31 289 2013-03-31 455 2013-06-30 367 2013-09-30 533 2013-12-31 474 2014-03-31 507 2014-06-30 595 2014-09-30 608 2014-12-31 247 2015-03-31 264 2015-06-30 261 2015-09-30 42 2015-12-31 228 2016-03-31 111 2016-06-30 89 2016-09-30 152 2016-12-31 352 2017-03-31 513 2017-06-30 -417 2017-09-30 42 2017-12-31 361 2018-03-31 296 2018-06-30 232 2018-09-30 142 2018-12-31 65 2019-03-31 -122 2019-06-30 -171 2019-09-30 -25 2019-12-31 -269 2020-03-31 -50 2020-06-30 -70 2020-09-30 587 2020-12-31 -296 2021-03-31 -48 2021-06-30 708 2021-09-30 554 2021-12-31 710 2022-03-31 790 2022-06-30 475 2022-09-30 -68 2022-12-31 -44 2023-03-31 43 2023-06-30 427 2023-09-30 471