Quarter	US dollars
2004-12-31	1862
2005-03-31	1822
2005-06-30	1787
2005-09-30	1848
2005-12-31	2288
2006-03-31	2177
2006-06-30	2121
2006-09-30	2451
2006-12-31	2969
2007-03-31	2667
2007-06-30	3409
2007-09-30	3987
2007-12-31	8973
2008-03-31	9494
2008-06-30	10492
2008-09-30	9864
2008-12-31	6957
2009-03-31	6556
2009-06-30	7358
2009-09-30	8011
2009-12-31	8759
2010-03-31	10802
2010-06-30	10117
2010-09-30	11544
2010-12-31	9772
2011-03-31	9326
2011-06-30	10152
2011-09-30	8684
2011-12-31	8879
2012-03-31	10418
2012-06-30	9084
2012-09-30	10594
2012-12-31	12065
2013-03-31	9968
2013-06-30	5609
2013-09-30	5472
2013-12-31	5063
2014-03-31	4190
2014-06-30	4360
2014-09-30	4794
2014-12-31	4504
2015-03-31	3831
2015-06-30	3706
2015-09-30	2520
2015-12-31	3044
2016-03-31	3129
2016-06-30	3301
2016-09-30	3848
2016-12-31	3624
2017-03-31	6439
2017-06-30	9253
2017-09-30	8295
2017-12-31	7645
2018-03-31	7007
2018-06-30	4613
2018-09-30	5108
2018-12-31	4931
2019-03-31	6098
2019-06-30	7777
2019-09-30	6536
2019-12-31	7458
2020-03-31	7066
2020-06-30	7441
2020-09-30	8062
2020-12-31	9700
2021-03-31	10368
2021-06-30	12140
2021-09-30	12319
2021-12-31	13331
2022-03-31	11885
2022-06-30	9937
2022-09-30	8983
2022-12-31	10755
2023-03-31	10731
2023-06-30	11847
2023-09-30	11014