Quarter	US dollars
2004-12-31	1271
2005-03-31	1637
2005-06-30	1369
2005-09-30	1215
2005-12-31	1440
2006-03-31	1819
2006-06-30	1827
2006-09-30	1892
2006-12-31	2004
2007-03-31	3415
2007-06-30	3573
2007-09-30	4171
2007-12-31	4460
2008-03-31	4452
2008-06-30	3922
2008-09-30	3580
2008-12-31	2762
2009-03-31	2816
2009-06-30	2757
2009-09-30	2861
2009-12-31	2882
2010-03-31	3014
2010-06-30	2479
2010-09-30	3298
2010-12-31	3477
2011-03-31	3361
2011-06-30	2829
2011-09-30	4004
2011-12-31	2577
2012-03-31	3546
2012-06-30	3129
2012-09-30	2837
2012-12-31	3137
2013-03-31	2247
2013-06-30	2322
2013-09-30	2442
2013-12-31	2359
2014-03-31	2484
2014-06-30	2530
2014-09-30	2951
2014-12-31	3036
2015-03-31	2996
2015-06-30	2861
2015-09-30	3809
2015-12-31	3161
2016-03-31	3111
2016-06-30	2909
2016-09-30	3484
2016-12-31	4310
2017-03-31	4365
2017-06-30	3809
2017-09-30	4718
2017-12-31	5278
2018-03-31	3759
2018-06-30	3442
2018-09-30	4609
2018-12-31	3194
2019-03-31	2938
2019-06-30	2929
2019-09-30	3159
2019-12-31	2902
2020-03-31	2585
2020-06-30	2100
2020-09-30	1778
2020-12-31	3064
2021-03-31	2981
2021-06-30	2776
2021-09-30	3002
2021-12-31	3389
2022-03-31	3689
2022-06-30	4440
2022-09-30	4523
2022-12-31	3843
2023-03-31	5041
2023-06-30	4102
2023-09-30	3476