Quarter	US dollars
2004-12-31	2851
2005-03-31	2246
2005-06-30	3621
2005-09-30	4282
2005-12-31	3612
2006-03-31	2987
2006-06-30	3366
2006-09-30	3430
2006-12-31	4861
2007-03-31	5668
2007-06-30	5939
2007-09-30	5811
2007-12-31	5997
2008-03-31	8664
2008-06-30	10227
2008-09-30	10055
2008-12-31	10037
2009-03-31	5996
2009-06-30	4328
2009-09-30	4894
2009-12-31	4718
2010-03-31	4926
2010-06-30	5657
2010-09-30	4815
2010-12-31	10550
2011-03-31	8393
2011-06-30	10271
2011-09-30	9659
2011-12-31	7503
2012-03-31	7976
2012-06-30	7448
2012-09-30	8701
2012-12-31	6170
2013-03-31	11384
2013-06-30	11371
2013-09-30	14649
2013-12-31	12341
2014-03-31	13780
2014-06-30	16685
2014-09-30	18764
2014-12-31	20259
2015-03-31	18015
2015-06-30	14066
2015-09-30	11506
2015-12-31	9712
2016-03-31	9840
2016-06-30	8151
2016-09-30	3526
2016-12-31	3243
2017-03-31	3408
2017-06-30	3583
2017-09-30	3591
2017-12-31	3287
2018-03-31	2724
2018-06-30	2634
2018-09-30	2612
2018-12-31	2771
2019-03-31	3157
2019-06-30	2187
2019-09-30	2181
2019-12-31	3057
2020-03-31	2157
2020-06-30	1472
2020-09-30	1637
2020-12-31	1654
2021-03-31	1769
2021-06-30	2304
2021-09-30	2492
2021-12-31	3430
2022-03-31	3125
2022-06-30	3984
2022-09-30	4439
2022-12-31	3393
2023-03-31	4270
2023-06-30	4468
2023-09-30	4059