Quarter	US dollars
2004-12-31	8396
2005-03-31	8647
2005-06-30	8468
2005-09-30	7570
2005-12-31	10250
2006-03-31	9437
2006-06-30	9264
2006-09-30	6774
2006-12-31	20517
2007-03-31	12219
2007-06-30	12474
2007-09-30	12133
2007-12-31	13936
2008-03-31	15942
2008-06-30	13724
2008-09-30	17053
2008-12-31	13608
2009-03-31	6294
2009-06-30	6852
2009-09-30	6336
2009-12-31	9610
2010-03-31	9890
2010-06-30	9378
2010-09-30	9889
2010-12-31	8396
2011-03-31	9070
2011-06-30	9616
2011-09-30	9002
2011-12-31	9015
2012-03-31	7815
2012-06-30	7112
2012-09-30	6440
2012-12-31	6234
2013-03-31	6564
2013-06-30	6733
2013-09-30	6563
2013-12-31	8163
2014-03-31	8126
2014-06-30	9027
2014-09-30	8289
2014-12-31	7532
2015-03-31	6681
2015-06-30	7229
2015-09-30	6506
2015-12-31	6271
2016-03-31	6001
2016-06-30	5154
2016-09-30	5998
2016-12-31	5182
2017-03-31	5477
2017-06-30	6135
2017-09-30	7262
2017-12-31	7624
2018-03-31	7648
2018-06-30	8446
2018-09-30	8003
2018-12-31	11168
2019-03-31	13044
2019-06-30	13213
2019-09-30	16213
2019-12-31	11396
2020-03-31	12609
2020-06-30	11769
2020-09-30	11486
2020-12-31	12523
2021-03-31	13705
2021-06-30	12606
2021-09-30	10975
2021-12-31	8384
2022-03-31	11583
2022-06-30	6957
2022-09-30	8149
2022-12-31	10291
2023-03-31	13244
2023-06-30	13169
2023-09-30	16493