Quarter	US dollars
2004-12-31	8186
2005-03-31	9261
2005-06-30	9380
2005-09-30	10072
2005-12-31	10158
2006-03-31	10378
2006-06-30	10723
2006-09-30	12050
2006-12-31	12480
2007-03-31	12521
2007-06-30	13633
2007-09-30	18060
2007-12-31	18575
2008-03-31	20986
2008-06-30	16781
2008-09-30	18985
2008-12-31	11587
2009-03-31	10115
2009-06-30	9525
2009-09-30	8870
2009-12-31	9776
2010-03-31	9393
2010-06-30	10185
2010-09-30	9514
2010-12-31	9188
2011-03-31	10867
2011-06-30	10295
2011-09-30	11139
2011-12-31	10710
2012-03-31	12112
2012-06-30	11438
2012-09-30	12325
2012-12-31	11520
2013-03-31	11648
2013-06-30	12085
2013-09-30	11423
2013-12-31	9983
2014-03-31	11224
2014-06-30	10477
2014-09-30	10724
2014-12-31	10588
2015-03-31	10161
2015-06-30	10842
2015-09-30	11044
2015-12-31	8042
2016-03-31	8072
2016-06-30	8158
2016-09-30	7066
2016-12-31	7301
2017-03-31	7327
2017-06-30	7413
2017-09-30	7881
2017-12-31	8355
2018-03-31	9140
2018-06-30	8360
2018-09-30	8036
2018-12-31	10067
2019-03-31	9603
2019-06-30	9307
2019-09-30	9292
2019-12-31	10248
2020-03-31	9132
2020-06-30	9189
2020-09-30	8839
2020-12-31	8473
2021-03-31	8585
2021-06-30	7512
2021-09-30	7664
2021-12-31	8065
2022-03-31	8842
2022-06-30	8619
2022-09-30	8285
2022-12-31	9077
2023-03-31	7504
2023-06-30	8696
2023-09-30	8299