Quarter	US dollars
2004-12-31	1809
2005-03-31	1953
2005-06-30	1837
2005-09-30	1972
2005-12-31	2062
2006-03-31	2036
2006-06-30	2277
2006-09-30	2219
2006-12-31	2378
2007-03-31	2391
2007-06-30	2540
2007-09-30	2685
2007-12-31	2377
2008-03-31	7594
2008-06-30	8969
2008-09-30	9675
2008-12-31	8927
2009-03-31	8821
2009-06-30	8206
2009-09-30	7016
2009-12-31	6687
2010-03-31	5952
2010-06-30	5210
2010-09-30	5475
2010-12-31	5146
2011-03-31	5266
2011-06-30	5152
2011-09-30	5245
2011-12-31	4782
2012-03-31	4876
2012-06-30	4698
2012-09-30	4732
2012-12-31	4829
2013-03-31	4583
2013-06-30	4456
2013-09-30	4500
2013-12-31	4687
2014-03-31	4894
2014-06-30	4968
2014-09-30	4643
2014-12-31	4553
2015-03-31	4562
2015-06-30	4439
2015-09-30	4165
2015-12-31	4097
2016-03-31	3722
2016-06-30	3748
2016-09-30	3650
2016-12-31	3319
2017-03-31	3338
2017-06-30	3681
2017-09-30	3883
2017-12-31	3833
2018-03-31	4764
2018-06-30	4356
2018-09-30	4225
2018-12-31	3782
2019-03-31	3875
2019-06-30	4126
2019-09-30	3860
2019-12-31	3727
2020-03-31	3815
2020-06-30	3866
2020-09-30	3776
2020-12-31	3766
2021-03-31	3677
2021-06-30	3618
2021-09-30	3541
2021-12-31	3443
2022-03-31	3454
2022-06-30	3415
2022-09-30	3385
2022-12-31	3316
2023-03-31	3402
2023-06-30	3271
2023-09-30	3352