Quarter	US dollars
2004-12-31	1947
2005-03-31	2376
2005-06-30	2015
2005-09-30	3039
2005-12-31	2786
2006-03-31	3859
2006-06-30	2783
2006-09-30	2599
2006-12-31	2728
2007-03-31	4713
2007-06-30	2857
2007-09-30	8685
2007-12-31	3934
2008-03-31	4977
2008-06-30	4641
2008-09-30	3407
2008-12-31	1566
2009-03-31	1539
2009-06-30	1459
2009-09-30	3979
2009-12-31	5831
2010-03-31	8058
2010-06-30	9507
2010-09-30	9322
2010-12-31	10613
2011-03-31	12563
2011-06-30	13415
2011-09-30	12099
2011-12-31	13640
2012-03-31	16529
2012-06-30	15736
2012-09-30	14767
2012-12-31	16457
2013-03-31	14871
2013-06-30	19095
2013-09-30	20060
2013-12-31	19030
2014-03-31	17287
2014-06-30	18600
2014-09-30	18397
2014-12-31	16814
2015-03-31	15668
2015-06-30	18126
2015-09-30	13060
2015-12-31	13251
2016-03-31	15823
2016-06-30	16853
2016-09-30	17036
2016-12-31	15636
2017-03-31	17117
2017-06-30	18508
2017-09-30	16904
2017-12-31	15083
2018-03-31	15968
2018-06-30	18305
2018-09-30	17841
2018-12-31	17699
2019-03-31	17085
2019-06-30	18425
2019-09-30	16195