Quarter	US dollars
2004-12-31	3865
2005-03-31	3422
2005-06-30	2612
2005-09-30	3723
2005-12-31	3440
2006-03-31	3674
2006-06-30	3704
2006-09-30	3957
2006-12-31	4458
2007-03-31	4735
2007-06-30	5128
2007-09-30	6597
2007-12-31	5744
2008-03-31	7336
2008-06-30	7837
2008-09-30	7820
2008-12-31	14705
2009-03-31	11099
2009-06-30	11852
2009-09-30	12172
2009-12-31	11751
2010-03-31	13725
2010-06-30	16316
2010-09-30	16231
2010-12-31	17415
2011-03-31	20137
2011-06-30	22111
2011-09-30	22552
2011-12-31	24526
2012-03-31	23722
2012-06-30	21335
2012-09-30	20046
2012-12-31	21924
2013-03-31	22466
2013-06-30	21067
2013-09-30	21476
2013-12-31	21546
2014-03-31	24326
2014-06-30	21828
2014-09-30	22582
2014-12-31	19953
2015-03-31	18119
2015-06-30	21547
2015-09-30	19349
2015-12-31	18503
2016-03-31	20237
2016-06-30	25069
2016-09-30	25219
2016-12-31	22791
2017-03-31	25402
2017-06-30	26105
2017-09-30	29747
2017-12-31	32140
2018-03-31	33539
2018-06-30	31700
2018-09-30	33779
2018-12-31	39345
2019-03-31	40449
2019-06-30	36020
2019-09-30	34198
2019-12-31	40076
2020-03-31	43438
2020-06-30	54360
2020-09-30	56787
2020-12-31	61769
2021-03-31	60898
2021-06-30	63070
2021-09-30	66743
2021-12-31	65122
2022-03-31	63170
2022-06-30	64222
2022-09-30	64790
2022-12-31	72714
2023-03-31	75655
2023-06-30	74008
2023-09-30	67941