Quarter	US dollars
2004-12-31	1519
2005-03-31	1675
2005-06-30	1728
2005-09-30	2319
2005-12-31	1018
2006-03-31	1122
2006-06-30	1137
2006-09-30	1175
2006-12-31	1194
2007-03-31	620
2007-06-30	1152
2007-09-30	1754
2007-12-31	1810
2008-03-31	1431
2008-06-30	2088
2008-09-30	3160
2008-12-31	4078
2009-03-31	3541
2009-06-30	2795
2009-09-30	3779
2009-12-31	2832
2010-03-31	1815
2010-06-30	3293
2010-09-30	4582
2010-12-31	5717
2011-03-31	5258
2011-06-30	6230
2011-09-30	7668
2011-12-31	6803
2012-03-31	7762
2012-06-30	7812
2012-09-30	7017
2012-12-31	8247
2013-03-31	10631
2013-06-30	9599
2013-09-30	11520
2013-12-31	11877
2014-03-31	13655
2014-06-30	14406
2014-09-30	16450
2014-12-31	17810
2015-03-31	16140
2015-06-30	15996
2015-09-30	12466
2015-12-31	12635
2016-03-31	12069
2016-06-30	11836
2016-09-30	12218
2016-12-31	13103
2017-03-31	15292
2017-06-30	12290
2017-09-30	11255
2017-12-31	10662
2018-03-31	11305
2018-06-30	10819
2018-09-30	12234
2018-12-31	14400
2019-03-31	15713
2019-06-30	15284
2019-09-30	15810