Quarter	US dollars
2004-12-31	1066
2005-03-31	1350
2005-06-30	1629
2005-09-30	1820
2005-12-31	1969
2006-03-31	2492
2006-06-30	2732
2006-09-30	3766
2006-12-31	3846
2007-03-31	3891
2007-06-30	4653
2007-09-30	5016
2007-12-31	5256
2008-03-31	4921
2008-06-30	5393
2008-09-30	4535
2008-12-31	4329
2009-03-31	2901
2009-06-30	3855
2009-09-30	3949
2009-12-31	3515
2010-03-31	3403
2010-06-30	4372
2010-09-30	4723
2010-12-31	6665
2011-03-31	6411
2011-06-30	5791
2011-09-30	5865
2011-12-31	5320
2012-03-31	3966
2012-06-30	5990
2012-09-30	6707
2012-12-31	11077
2013-03-31	21272
2013-06-30	22895
2013-09-30	21200
2013-12-31	19526
2014-03-31	18560
2014-06-30	13985
2014-09-30	13112
2014-12-31	11706
2015-03-31	11849
2015-06-30	13458
2015-09-30	13346
2015-12-31	12752
2016-03-31	13951
2016-06-30	13609
2016-09-30	13213
2016-12-31	11939
2017-03-31	11677
2017-06-30	12338
2017-09-30	13172
2017-12-31	13099
2018-03-31	14020
2018-06-30	14469
2018-09-30	11064
2018-12-31	14403
2019-03-31	15442
2019-06-30	16711
2019-09-30	18163
2019-12-31	18479
2020-03-31	20684
2020-06-30	19693
2020-09-30	19732
2020-12-31	17445
2021-03-31	17976
2021-06-30	15703
2021-09-30	15861
2021-12-31	14877
2022-03-31	15557
2022-06-30	15425
2022-09-30	15639
2022-12-31	14179
2023-03-31	14418
2023-06-30	12991
2023-09-30	13080