Quarter	US dollars
2004-12-31	2786
2005-03-31	2718
2005-06-30	2458
2005-09-30	2984
2005-12-31	2604
2006-03-31	2706
2006-06-30	2582
2006-09-30	2849
2006-12-31	3194
2007-03-31	4429
2007-06-30	3921
2007-09-30	4863
2007-12-31	4844
2008-03-31	6004
2008-06-30	6149
2008-09-30	6339
2008-12-31	4139
2009-03-31	5583
2009-06-30	5301
2009-09-30	6367
2009-12-31	8148
2010-03-31	11955
2010-06-30	10672
2010-09-30	11451
2010-12-31	14201
2011-03-31	16105
2011-06-30	14405
2011-09-30	14559
2011-12-31	15074
2012-03-31	16708
2012-06-30	16746
2012-09-30	15193
2012-12-31	16105
2013-03-31	17364
2013-06-30	16305
2013-09-30	15148
2013-12-31	12626
2014-03-31	13082
2014-06-30	12722
2014-09-30	12864
2014-12-31	11166
2015-03-31	12059
2015-06-30	10325
2015-09-30	9656
2015-12-31	8262
2016-03-31	8886
2016-06-30	6963
2016-09-30	9235
2016-12-31	9687
2017-03-31	9609
2017-06-30	6792
2017-09-30	8555
2017-12-31	8378
2018-03-31	11050
2018-06-30	11100
2018-09-30	11638
2018-12-31	9420
2019-03-31	11365
2019-06-30	10992
2019-09-30	8838
2019-12-31	6748
2020-03-31	8569
2020-06-30	7671
2020-09-30	5871
2020-12-31	6647
2021-03-31	7922
2021-06-30	7216
2021-09-30	7876
2021-12-31	9085
2022-03-31	7656
2022-06-30	7753
2022-09-30	8291
2022-12-31	6808
2023-03-31	7882
2023-06-30	6890
2023-09-30	8981