Quarter	US dollars
2004-12-31	7107
2005-03-31	7378
2005-06-30	7258
2005-09-30	7406
2005-12-31	7328
2006-03-31	8523
2006-06-30	12665
2006-09-30	16059
2006-12-31	14961
2007-03-31	14580
2007-06-30	17452
2007-09-30	17426
2007-12-31	19561
2008-03-31	20732
2008-06-30	18996
2008-09-30	17997
2008-12-31	11422
2009-03-31	11442
2009-06-30	12817
2009-09-30	11577
2009-12-31	11229
2010-03-31	9508
2010-06-30	9704
2010-09-30	9611
2010-12-31	9476
2011-03-31	10185
2011-06-30	8831
2011-09-30	7732
2011-12-31	8422
2012-03-31	9088
2012-06-30	9018
2012-09-30	9930
2012-12-31	9795
2013-03-31	9019
2013-06-30	8381
2013-09-30	8968
2013-12-31	9456
2014-03-31	10669
2014-06-30	9711
2014-09-30	10108
2014-12-31	14266
2015-03-31	9262
2015-06-30	8804
2015-09-30	9658
2015-12-31	9564
2016-03-31	9504
2016-06-30	9518
2016-09-30	8370
2016-12-31	8472
2017-03-31	9547
2017-06-30	9411
2017-09-30	9630
2017-12-31	8168
2018-03-31	8413
2018-06-30	8475
2018-09-30	9453
2018-12-31	9927
2019-03-31	11098
2019-06-30	10770
2019-09-30	10339
2019-12-31	11564
2020-03-31	10234
2020-06-30	9531
2020-09-30	11805
2020-12-31	11696
2021-03-31	12267
2021-06-30	12893
2021-09-30	11855
2021-12-31	12039
2022-03-31	12120
2022-06-30	11121
2022-09-30	11288
2022-12-31	11358
2023-03-31	11701
2023-06-30	11152
2023-09-30	10853