Quarter	US dollars
2004-12-31	4806
2005-03-31	5059
2005-06-30	4693
2005-09-30	4509
2005-12-31	4897
2006-03-31	6321
2006-06-30	5286
2006-09-30	5995
2006-12-31	5938
2007-03-31	6906
2007-06-30	6126
2007-09-30	7555
2007-12-31	6825
2008-03-31	9464
2008-06-30	6955
2008-09-30	7250
2008-12-31	7769
2009-03-31	7648
2009-06-30	8043
2009-09-30	9090
2009-12-31	9800
2010-03-31	9953
2010-06-30	10372
2010-09-30	12306
2010-12-31	11495
2011-03-31	12535
2011-06-30	11774
2011-09-30	10768
2011-12-31	11132
2012-03-31	11040
2012-06-30	9890
2012-09-30	9948
2012-12-31	11329
2013-03-31	11116
2013-06-30	10567
2013-09-30	10040
2013-12-31	9345
2014-03-31	9630
2014-06-30	10150
2014-09-30	10854
2014-12-31	9977
2015-03-31	10334
2015-06-30	10112
2015-09-30	8976
2015-12-31	9580
2016-03-31	9819
2016-06-30	9442
2016-09-30	9776
2016-12-31	8590
2017-03-31	9400
2017-06-30	7934
2017-09-30	8133
2017-12-31	9018
2018-03-31	10261
2018-06-30	8772
2018-09-30	8268
2018-12-31	7866
2019-03-31	9289
2019-06-30	8726
2019-09-30	8943
2019-12-31	9338
2020-03-31	8944
2020-06-30	10750
2020-09-30	9075
2020-12-31	9949
2021-03-31	8825
2021-06-30	8065
2021-09-30	7734
2021-12-31	8443
2022-03-31	8488
2022-06-30	8142
2022-09-30	6990
2022-12-31	7765
2023-03-31	8847
2023-06-30	8602
2023-09-30	7706