Quarter	US dollars
2004-12-31	1137
2005-03-31	1490
2005-06-30	1402
2005-09-30	1516
2005-12-31	1631
2006-03-31	1547
2006-06-30	1812
2006-09-30	2204
2006-12-31	2750
2007-03-31	3052
2007-06-30	3740
2007-09-30	3918
2007-12-31	4290
2008-03-31	4271
2008-06-30	4858
2008-09-30	4801
2008-12-31	4590
2009-03-31	4666
2009-06-30	4851
2009-09-30	4614
2009-12-31	4980
2010-03-31	3843
2010-06-30	4516
2010-09-30	5267
2010-12-31	7651
2011-03-31	6819
2011-06-30	7091
2011-09-30	7040
2011-12-31	7185
2012-03-31	9454
2012-06-30	9117
2012-09-30	8054
2012-12-31	13221
2013-03-31	40486
2013-06-30	39129
2013-09-30	31645
2013-12-31	23909
2014-03-31	20785
2014-06-30	19925
2014-09-30	19124
2014-12-31	17962
2015-03-31	17923
2015-06-30	17615
2015-09-30	16433
2015-12-31	15529
2016-03-31	17233
2016-06-30	16417
2016-09-30	14103
2016-12-31	13747
2017-03-31	13270
2017-06-30	12016
2017-09-30	11451
2017-12-31	11879
2018-03-31	10427
2018-06-30	9676
2018-09-30	12540
2018-12-31	9012
2019-03-31	9181
2019-06-30	8511
2019-09-30	8910
2019-12-31	9367
2020-03-31	9455
2020-06-30	9892
2020-09-30	10144
2020-12-31	9747
2021-03-31	9761
2021-06-30	9557
2021-09-30	9961
2021-12-31	9170
2022-03-31	11427
2022-06-30	11111
2022-09-30	11557
2022-12-31	11655
2023-03-31	11996
2023-06-30	11138
2023-09-30	11470