Quarter	US dollars
2004-12-31	34622
2005-03-31	39712
2005-06-30	46833
2005-09-30	54024
2005-12-31	61009
2006-03-31	86364
2006-06-30	100106
2006-09-30	104967
2006-12-31	119776
2007-03-31	134192
2007-06-30	142749
2007-09-30	160160
2007-12-31	194652
2008-03-31	274740
2008-06-30	252637
2008-09-30	217528
2008-12-31	182756
2009-03-31	162958
2009-06-30	155809
2009-09-30	150102
2009-12-31	139138
2010-03-31	121310
2010-06-30	110693
2010-09-30	132038
2010-12-31	180358
2011-03-31	177390
2011-06-30	201391
2011-09-30	304881
2011-12-31	276163
2012-03-31	288385
2012-06-30	246593
2012-09-30	278582
2012-12-31	359597
2013-03-31	552399
2013-06-30	553934
2013-09-30	555033
2013-12-31	510490
2014-03-31	523709
2014-06-30	440087
2014-09-30	381105
2014-12-31	319023
2015-03-31	270469
2015-06-30	262451
2015-09-30	243446
2015-12-31	227488
2016-03-31	247631
2016-06-30	222555
2016-09-30	219489
2016-12-31	200256
2017-03-31	202981
2017-06-30	168756
2017-09-30	168553
2017-12-31	176246
2018-03-31	135006
2018-06-30	125908
2018-09-30	141005
2018-12-31	126144
2019-03-31	129750
2019-06-30	134809
2019-09-30	145903
2019-12-31	138516
2020-03-31	136426
2020-06-30	135359
2020-09-30	140974
2020-12-31	137840
2021-03-31	153032
2021-06-30	142373
2021-09-30	151907
2021-12-31	152136
2022-03-31	155118
2022-06-30	152235
2022-09-30	158247
2022-12-31	155632
2023-03-31	166270
2023-06-30	145341
2023-09-30	143829