Quarter	US dollars
2004-12-31	1807
2005-03-31	1955
2005-06-30	1871
2005-09-30	2062
2005-12-31	2063
2006-03-31	2057
2006-06-30	2497
2006-09-30	2176
2006-12-31	2795
2007-03-31	2785
2007-06-30	2994
2007-09-30	3170
2007-12-31	2883
2008-03-31	8371
2008-06-30	9457
2008-09-30	9819
2008-12-31	9130
2009-03-31	8604
2009-06-30	8654
2009-09-30	7291
2009-12-31	7184
2010-03-31	6666
2010-06-30	5895
2010-09-30	6022
2010-12-31	5678
2011-03-31	5594
2011-06-30	5486
2011-09-30	5736
2011-12-31	5478
2012-03-31	5609
2012-06-30	5559
2012-09-30	5307
2012-12-31	5690
2013-03-31	5587
2013-06-30	4897
2013-09-30	5012
2013-12-31	5016
2014-03-31	5295
2014-06-30	5146
2014-09-30	5047
2014-12-31	4879
2015-03-31	4534
2015-06-30	4343
2015-09-30	3887
2015-12-31	3718
2016-03-31	3441
2016-06-30	3646
2016-09-30	3604
2016-12-31	3495
2017-03-31	3726
2017-06-30	3722
2017-09-30	3956
2017-12-31	3784
2018-03-31	3642
2018-06-30	4154
2018-09-30	4011
2018-12-31	4032
2019-03-31	3869
2019-06-30	4016
2019-09-30	4130
2019-12-31	3992
2020-03-31	4272
2020-06-30	4059
2020-09-30	4076
2020-12-31	4009
2021-03-31	4223
2021-06-30	4103
2021-09-30	4920
2021-12-31	4981
2022-03-31	4482
2022-06-30	4585
2022-09-30	4533
2022-12-31	4442
2023-03-31	4833
2023-06-30	4766
2023-09-30	4479