Quarter	US dollars
2004-12-31	3801
2005-03-31	4654
2005-06-30	4607
2005-09-30	4921
2005-12-31	4535
2006-03-31	4870
2006-06-30	5056
2006-09-30	5395
2006-12-31	5366
2007-03-31	5619
2007-06-30	7556
2007-09-30	7253
2007-12-31	6566
2008-03-31	7539
2008-06-30	7825
2008-09-30	8356
2008-12-31	7036
2009-03-31	6751
2009-06-30	8609
2009-09-30	7955
2009-12-31	8001
2010-03-31	11011
2010-06-30	11923
2010-09-30	14654
2010-12-31	14108
2011-03-31	16450
2011-06-30	17814
2011-09-30	17942
2011-12-31	17197
2012-03-31	19043
2012-06-30	19474
2012-09-30	19729
2012-12-31	21707
2013-03-31	20798
2013-06-30	19488
2013-09-30	19410
2013-12-31	19615
2014-03-31	19729
2014-06-30	20169
2014-09-30	18624
2014-12-31	18873
2015-03-31	18606
2015-06-30	18082
2015-09-30	16368
2015-12-31	15662
2016-03-31	15840
2016-06-30	15864
2016-09-30	15441
2016-12-31	14221
2017-03-31	16527
2017-06-30	17726
2017-09-30	17097
2017-12-31	16627
2018-03-31	15989
2018-06-30	14838
2018-09-30	14405
2018-12-31	14785
2019-03-31	15140
2019-06-30	15291
2019-09-30	14748
2019-12-31	14991
2020-03-31	13671
2020-06-30	13630
2020-09-30	12858
2020-12-31	14722
2021-03-31	13563
2021-06-30	14200
2021-09-30	15147
2021-12-31	15834
2022-03-31	15131
2022-06-30	15597
2022-09-30	16211
2022-12-31	14771
2023-03-31	14647
2023-06-30	15056
2023-09-30	15184