Quarter	US dollars
2004-12-31	566
2005-03-31	601
2005-06-30	520
2005-09-30	437
2005-12-31	453
2006-03-31	442
2006-06-30	538
2006-09-30	508
2006-12-31	479
2007-03-31	567
2007-06-30	550
2007-09-30	646
2007-12-31	864
2008-03-31	719
2008-06-30	1290
2008-09-30	912
2008-12-31	773
2009-03-31	672
2009-06-30	665
2009-09-30	691
2009-12-31	643
2010-03-31	614
2010-06-30	631
2010-09-30	1257
2010-12-31	2555
2011-03-31	2553
2011-06-30	2478
2011-09-30	2574
2011-12-31	2528
2012-03-31	10410
2012-06-30	10660
2012-09-30	10119
2012-12-31	11744
2013-03-31	22293
2013-06-30	23315
2013-09-30	21980
2013-12-31	17288
2014-03-31	18942
2014-06-30	16157
2014-09-30	19537
2014-12-31	17217
2015-03-31	18516
2015-06-30	21182
2015-09-30	18716
2015-12-31	15587
2016-03-31	17813
2016-06-30	16516
2016-09-30	16069
2016-12-31	16143
2017-03-31	16398
2017-06-30	15510
2017-09-30	15647
2017-12-31	14523
2018-03-31	13550
2018-06-30	14881
2018-09-30	10657
2018-12-31	16486
2019-03-31	17914
2019-06-30	18372
2019-09-30	18741
2019-12-31	18329
2020-03-31	19514
2020-06-30	17225
2020-09-30	15845
2020-12-31	13713
2021-03-31	13603
2021-06-30	14066
2021-09-30	14118
2021-12-31	14331
2022-03-31	15282
2022-06-30	14278
2022-09-30	11608
2022-12-31	10177
2023-03-31	9657
2023-06-30	7693
2023-09-30	7787