Quarter	US dollars
2004-12-31	1772
2005-03-31	1860
2005-06-30	1952
2005-09-30	1999
2005-12-31	2003
2006-03-31	2238
2006-06-30	2158
2006-09-30	2595
2006-12-31	4658
2007-03-31	4746
2007-06-30	4860
2007-09-30	4568
2007-12-31	4935
2008-03-31	5551
2008-06-30	4567
2008-09-30	4610
2008-12-31	4101
2009-03-31	4337
2009-06-30	4550
2009-09-30	4723
2009-12-31	4791
2010-03-31	5014
2010-06-30	6146
2010-09-30	5506
2010-12-31	5673
2011-03-31	6266
2011-06-30	6430
2011-09-30	6761
2011-12-31	5925
2012-03-31	5947
2012-06-30	5623
2012-09-30	5985
2012-12-31	5565
2013-03-31	5620
2013-06-30	5666
2013-09-30	5933
2013-12-31	5350
2014-03-31	5689
2014-06-30	5767
2014-09-30	5647
2014-12-31	5325
2015-03-31	5844
2015-06-30	5312
2015-09-30	5145
2015-12-31	4809
2016-03-31	4884
2016-06-30	4896
2016-09-30	5012
2016-12-31	5107
2017-03-31	5504
2017-06-30	6194
2017-09-30	6155
2017-12-31	5663
2018-03-31	5880
2018-06-30	5683
2018-09-30	5411
2018-12-31	4804
2019-03-31	4972
2019-06-30	4544
2019-09-30	4360
2019-12-31	4802
2020-03-31	4739
2020-06-30	4767
2020-09-30	4406
2020-12-31	4239
2021-03-31	5207
2021-06-30	5529
2021-09-30	5559
2021-12-31	5783
2022-03-31	5520
2022-06-30	5050
2022-09-30	4174
2022-12-31	3418
2023-03-31	2620
2023-06-30	2549
2023-09-30	2516