Quarter	US dollars
2004-12-31	8014
2005-03-31	9201
2005-06-30	9278
2005-09-30	9942
2005-12-31	10098
2006-03-31	10296
2006-06-30	10664
2006-09-30	12018
2006-12-31	12433
2007-03-31	12488
2007-06-30	13555
2007-09-30	17929
2007-12-31	18515
2008-03-31	20831
2008-06-30	16613
2008-09-30	18849
2008-12-31	11413
2009-03-31	9954
2009-06-30	9351
2009-09-30	8694
2009-12-31	9581
2010-03-31	9238
2010-06-30	9857
2010-09-30	9275
2010-12-31	8997
2011-03-31	10347
2011-06-30	10086
2011-09-30	10988
2011-12-31	10399
2012-03-31	11805
2012-06-30	11121
2012-09-30	12142
2012-12-31	11277
2013-03-31	11407
2013-06-30	11732
2013-09-30	11059
2013-12-31	8922
2014-03-31	10759
2014-06-30	10103
2014-09-30	10410
2014-12-31	10395
2015-03-31	10083
2015-06-30	10790
2015-09-30	10997
2015-12-31	7993
2016-03-31	7862
2016-06-30	8060
2016-09-30	6894
2016-12-31	7077
2017-03-31	7148
2017-06-30	7185
2017-09-30	7640
2017-12-31	7790
2018-03-31	8722
2018-06-30	8136
2018-09-30	7819
2018-12-31	9731
2019-03-31	9251
2019-06-30	8807
2019-09-30	8842
2019-12-31	9740
2020-03-31	8712
2020-06-30	8735
2020-09-30	8628
2020-12-31	8277
2021-03-31	8254
2021-06-30	7074
2021-09-30	7300
2021-12-31	7691
2022-03-31	7787
2022-06-30	7513
2022-09-30	7128
2022-12-31	7832
2023-03-31	6258
2023-06-30	7649
2023-09-30	7059