Quarter	US dollars
2004-12-31	1210
2005-03-31	1265
2005-06-30	1583
2005-09-30	1898
2005-12-31	1469
2006-03-31	1764
2006-06-30	1977
2006-09-30	1891
2006-12-31	1789
2007-03-31	2330
2007-06-30	2939
2007-09-30	2814
2007-12-31	2781
2008-03-31	2957
2008-06-30	3622
2008-09-30	3477
2008-12-31	3135
2009-03-31	3305
2009-06-30	3509
2009-09-30	3141
2009-12-31	3254
2010-03-31	2682
2010-06-30	3332
2010-09-30	3539
2010-12-31	8416
2011-03-31	7913
2011-06-30	9301
2011-09-30	12004
2011-12-31	9696
2012-03-31	13531
2012-06-30	12775
2012-09-30	10001
2012-12-31	14546
2013-03-31	33661
2013-06-30	29733
2013-09-30	29760
2013-12-31	24863
2014-03-31	23089
2014-06-30	19672
2014-09-30	18321
2014-12-31	17328
2015-03-31	14173
2015-06-30	13033
2015-09-30	12442
2015-12-31	11851
2016-03-31	14246
2016-06-30	12982
2016-09-30	13350
2016-12-31	12421
2017-03-31	13025
2017-06-30	9720
2017-09-30	10104
2017-12-31	11062
2018-03-31	7359
2018-06-30	6701
2018-09-30	4679
2018-12-31	6785
2019-03-31	7531
2019-06-30	8464
2019-09-30	8286
2019-12-31	8091
2020-03-31	8036
2020-06-30	7556
2020-09-30	8043
2020-12-31	7892
2021-03-31	8102
2021-06-30	8001
2021-09-30	8181
2021-12-31	8582
2022-03-31	8796
2022-06-30	8602
2022-09-30	8862
2022-12-31	10645
2023-03-31	12183
2023-06-30	11139
2023-09-30	10324