Quarter	US dollars
2004-12-31	511
2005-03-31	800
2005-06-30	871
2005-09-30	973
2005-12-31	1006
2006-03-31	1211
2006-06-30	1528
2006-09-30	1584
2006-12-31	1840
2007-03-31	3921
2007-06-30	3882
2007-09-30	5189
2007-12-31	4386
2008-03-31	4365
2008-06-30	5220
2008-09-30	5596
2008-12-31	7869
2009-03-31	8272
2009-06-30	8221
2009-09-30	8192
2009-12-31	8571
2010-03-31	9554
2010-06-30	10683
2010-09-30	11648
2010-12-31	13066
2011-03-31	11766
2011-06-30	12097
2011-09-30	12834
2011-12-31	12172
2012-03-31	13312
2012-06-30	11484
2012-09-30	11140
2012-12-31	8850
2013-03-31	9652
2013-06-30	8915
2013-09-30	8717
2013-12-31	5601
2014-03-31	6201
2014-06-30	6468
2014-09-30	7795
2014-12-31	8381
2015-03-31	10767
2015-06-30	9253
2015-09-30	9708
2015-12-31	9638
2016-03-31	9487
2016-06-30	9215
2016-09-30	8966
2016-12-31	9429
2017-03-31	9642
2017-06-30	10853
2017-09-30	9014
2017-12-31	9365
2018-03-31	10066
2018-06-30	10304
2018-09-30	11432
2018-12-31	11258
2019-03-31	11537
2019-06-30	11328
2019-09-30	11693
2019-12-31	13054
2020-03-31	14773
2020-06-30	17073
2020-09-30	16969
2020-12-31	17999
2021-03-31	17902
2021-06-30	17633
2021-09-30	18048
2021-12-31	18182
2022-03-31	17903
2022-06-30	18523
2022-09-30	17994
2022-12-31	19680
2023-03-31	20286
2023-06-30	21156
2023-09-30	20718