Quarter	US dollars
2004-12-31	1498
2005-03-31	1484
2005-06-30	1445
2005-09-30	1553
2005-12-31	1516
2006-03-31	1906
2006-06-30	1866
2006-09-30	2425
2006-12-31	2487
2007-03-31	2795
2007-06-30	2285
2007-09-30	4281
2007-12-31	3361
2008-03-31	5030
2008-06-30	2577
2008-09-30	4917
2008-12-31	1837
2009-03-31	1708
2009-06-30	2156
2009-09-30	3306
2009-12-31	2592
2010-03-31	3046
2010-06-30	3133
2010-09-30	3304
2010-12-31	4202
2011-03-31	4450
2011-06-30	5176
2011-09-30	4664
2011-12-31	4349
2012-03-31	6102
2012-06-30	4643
2012-09-30	4212
2012-12-31	3953
2013-03-31	3431
2013-06-30	3003
2013-09-30	3786
2013-12-31	4843
2014-03-31	3725
2014-06-30	4755
2014-09-30	4569
2014-12-31	5305
2015-03-31	4009
2015-06-30	5404
2015-09-30	5657
2015-12-31	3939
2016-03-31	4433
2016-06-30	3857
2016-09-30	3715
2016-12-31	3583
2017-03-31	4923
2017-06-30	5147
2017-09-30	5188
2017-12-31	5582
2018-03-31	4726
2018-06-30	4274
2018-09-30	3846
2018-12-31	3314
2019-03-31	2790
2019-06-30	2857
2019-09-30	2708
2019-12-31	4601
2020-03-31	2285
2020-06-30	2321
2020-09-30	2417
2020-12-31	3322
2021-03-31	1971
2021-06-30	2027
2021-09-30	1726
2021-12-31	5686
2022-03-31	8299
2022-06-30	9851
2022-09-30	12312
2022-12-31	6959
2023-03-31	4875
2023-06-30	5570
2023-09-30	5007