Quarter	US dollars
2004-12-31	10759
2005-03-31	10038
2005-06-30	11779
2005-09-30	10738
2005-12-31	10808
2006-03-31	10745
2006-06-30	12848
2006-09-30	12674
2006-12-31	13750
2007-03-31	12597
2007-06-30	14946
2007-09-30	16144
2007-12-31	16299
2008-03-31	18627
2008-06-30	18466
2008-09-30	16688
2008-12-31	16074
2009-03-31	13748
2009-06-30	16428
2009-09-30	21338
2009-12-31	19407
2010-03-31	19573
2010-06-30	19416
2010-09-30	21658
2010-12-31	23414
2011-03-31	16479
2011-06-30	17357
2011-09-30	17679
2011-12-31	17323
2012-03-31	15818
2012-06-30	16425
2012-09-30	16388
2012-12-31	15744
2013-03-31	10879
2013-06-30	10629
2013-09-30	10970
2013-12-31	8763
2014-03-31	9567
2014-06-30	10181
2014-09-30	10071
2014-12-31	10379
2015-03-31	9743
2015-06-30	9834
2015-09-30	9185
2015-12-31	10575
2016-03-31	10864
2016-06-30	10018
2016-09-30	9872
2016-12-31	9678
2017-03-31	10578
2017-06-30	10567
2017-09-30	12108
2017-12-31	12556
2018-03-31	11398
2018-06-30	12593
2018-09-30	12635
2018-12-31	13582
2019-03-31	13800
2019-06-30	14907
2019-09-30	13720
2019-12-31	14542
2020-03-31	11016
2020-06-30	15305
2020-09-30	16752
2020-12-31	19029
2021-03-31	17968
2021-06-30	19441
2021-09-30	17380
2021-12-31	20201
2022-03-31	19647
2022-06-30	17826
2022-09-30	14814
2022-12-31	17111
2023-03-31	17596
2023-06-30	18091
2023-09-30	17192