Quarter US dollars 2004-12-31 198 2005-03-31 176 2005-06-30 220 2005-09-30 320 2005-12-31 321 2006-03-31 338 2006-06-30 375 2006-09-30 361 2006-12-31 671 2007-03-31 681 2007-06-30 678 2007-09-30 911 2007-12-31 1065 2008-03-31 1131 2008-06-30 993 2008-09-30 766 2008-12-31 585 2009-03-31 570 2009-06-30 641 2009-09-30 688 2009-12-31 89 2010-03-31 317 2010-06-30 492 2010-09-30 440 2010-12-31 374 2011-03-31 434 2011-06-30 347 2011-09-30 229 2011-12-31 363 2012-03-31 850 2012-06-30 886 2012-09-30 455 2012-12-31 394 2013-03-31 682 2013-06-30 541 2013-09-30 228 2013-12-31 200 2014-03-31 218 2014-06-30 323 2014-09-30 186 2014-12-31 256 2015-03-31 321 2015-06-30 151 2015-09-30 153 2015-12-31 379 2016-03-31 541 2016-06-30 518 2016-09-30 318 2016-12-31 418 2017-03-31 564 2017-06-30 516 2017-09-30 233 2017-12-31 338 2018-03-31 549 2018-06-30 34 2018-09-30 190 2018-12-31 37 2019-03-31 774 2019-06-30 922 2019-09-30 80 2019-12-31 446 2020-03-31 763 2020-06-30 772 2020-09-30 288 2020-12-31 378 2021-03-31 1065 2021-06-30 942 2021-09-30 357 2021-12-31 315 2022-03-31 1600 2022-06-30 1460 2022-09-30 303 2022-12-31 372 2023-03-31 907 2023-06-30 591 2023-09-30 339