Quarter	US dollars
2004-12-31	4602
2005-03-31	5070
2005-06-30	4902
2005-09-30	5195
2005-12-31	5739
2006-03-31	6602
2006-06-30	6822
2006-09-30	7415
2006-12-31	7141
2007-03-31	7647
2007-06-30	8393
2007-09-30	8940
2007-12-31	9053
2008-03-31	9777
2008-06-30	8615
2008-09-30	8994
2008-12-31	9146
2009-03-31	8693
2009-06-30	8359
2009-09-30	8278
2009-12-31	9847
2010-03-31	10022
2010-06-30	10517
2010-09-30	10619
2010-12-31	6249
2011-03-31	7980
2011-06-30	6845
2011-09-30	7627
2011-12-31	8225
2012-03-31	5865
2012-06-30	6638
2012-09-30	7072
2012-12-31	6467
2013-03-31	6566
2013-06-30	10254
2013-09-30	8763
2013-12-31	8039
2014-03-31	7660
2014-06-30	7965
2014-09-30	7790
2014-12-31	8709
2015-03-31	6836
2015-06-30	6859
2015-09-30	6398
2015-12-31	5533
2016-03-31	7835
2016-06-30	8617
2016-09-30	8835
2016-12-31	8980
2017-03-31	11710
2017-06-30	8163
2017-09-30	6952
2017-12-31	5978
2018-03-31	5337
2018-06-30	5767
2018-09-30	8259
2018-12-31	6955
2019-03-31	5840
2019-06-30	7512
2019-09-30	5832
2019-12-31	5926
2020-03-31	6345
2020-06-30	6765
2020-09-30	6506
2020-12-31	7355
2021-03-31	10085
2021-06-30	6623
2021-09-30	7013
2021-12-31	6100
2022-03-31	7564
2022-06-30	5959
2022-09-30	5159
2022-12-31	5654
2023-03-31	4504
2023-06-30	5391
2023-09-30	4791