Quarter	US dollars
2004-12-31	11112
2005-03-31	10443
2005-06-30	8588
2005-09-30	11561
2005-12-31	8247
2006-03-31	12202
2006-06-30	12101
2006-09-30	11377
2006-12-31	11486
2007-03-31	12741
2007-06-30	11776
2007-09-30	12349
2007-12-31	11410
2008-03-31	12054
2008-06-30	8687
2008-09-30	11429
2008-12-31	7618
2009-03-31	7476
2009-06-30	7279
2009-09-30	7781
2009-12-31	7204
2010-03-31	8369
2010-06-30	10563
2010-09-30	8675
2010-12-31	7317
2011-03-31	8674
2011-06-30	8075
2011-09-30	11985
2011-12-31	7533
2012-03-31	7369
2012-06-30	5942
2012-09-30	5969
2012-12-31	5248
2013-03-31	3772
2013-06-30	4027
2013-09-30	4792
2013-12-31	3735
2014-03-31	4222
2014-06-30	4478
2014-09-30	5353
2014-12-31	4934
2015-03-31	5933
2015-06-30	4535
2015-09-30	4838
2015-12-31	4106
2016-03-31	3840
2016-06-30	4061
2016-09-30	4208
2016-12-31	3184
2017-03-31	4723
2017-06-30	4957
2017-09-30	3763
2017-12-31	4152
2018-03-31	5365
2018-06-30	5016
2018-09-30	3878
2018-12-31	1897
2019-03-31	3816
2019-06-30	1927
2019-09-30	3075
2019-12-31	1864
2020-03-31	3546
2020-06-30	2215
2020-09-30	2679
2020-12-31	2485
2021-03-31	3005
2021-06-30	2859
2021-09-30	3198
2021-12-31	2005
2022-03-31	2505
2022-06-30	2472
2022-09-30	3173
2022-12-31	1410
2023-03-31	2779
2023-06-30	3650
2023-09-30	3018