Quarter	US dollars
2004-12-31	2720
2005-03-31	3206
2005-06-30	3205
2005-09-30	3062
2005-12-31	2958
2006-03-31	3327
2006-06-30	3340
2006-09-30	4125
2006-12-31	3840
2007-03-31	4999
2007-06-30	4793
2007-09-30	6253
2007-12-31	5371
2008-03-31	8616
2008-06-30	9923
2008-09-30	10839
2008-12-31	6402
2009-03-31	8421
2009-06-30	9774
2009-09-30	10060
2009-12-31	8822
2010-03-31	7882
2010-06-30	7147
2010-09-30	8635
2010-12-31	7256
2011-03-31	7997
2011-06-30	9467
2011-09-30	8497
2011-12-31	8555
2012-03-31	10498
2012-06-30	9766
2012-09-30	10644
2012-12-31	11499
2013-03-31	11603
2013-06-30	10628
2013-09-30	12180
2013-12-31	12203
2014-03-31	11494
2014-06-30	11443
2014-09-30	10666
2014-12-31	11985
2015-03-31	12944
2015-06-30	11314
2015-09-30	11978
2015-12-31	8714
2016-03-31	10865
2016-06-30	10242
2016-09-30	9528
2016-12-31	8111
2017-03-31	7001
2017-06-30	8942
2017-09-30	7658
2017-12-31	8329
2018-03-31	9046
2018-06-30	9379
2018-09-30	9879
2018-12-31	8754
2019-03-31	10060
2019-06-30	10902
2019-09-30	9645
2019-12-31	8324
2020-03-31	8324
2020-06-30	9002
2020-09-30	9167
2020-12-31	7335
2021-03-31	9614
2021-06-30	8540
2021-09-30	8046
2021-12-31	9472
2022-03-31	9615
2022-06-30	7442
2022-09-30	7513
2022-12-31	7354
2023-03-31	8398
2023-06-30	8976
2023-09-30	10254