Quarter	US dollars
2004-12-31	2421
2005-03-31	3095
2005-06-30	3596
2005-09-30	4199
2005-12-31	3002
2006-03-31	4111
2006-06-30	4268
2006-09-30	5336
2006-12-31	6192
2007-03-31	5129
2007-06-30	4496
2007-09-30	5853
2007-12-31	6689
2008-03-31	8499
2008-06-30	8961
2008-09-30	9912
2008-12-31	5733
2009-03-31	4715
2009-06-30	5448
2009-09-30	4752
2009-12-31	6861
2010-03-31	6625
2010-06-30	8392
2010-09-30	8224
2010-12-31	6894
2011-03-31	6832
2011-06-30	7586
2011-09-30	6478
2011-12-31	5863
2012-03-31	6857
2012-06-30	6685
2012-09-30	6445
2012-12-31	7007
2013-03-31	6576
2013-06-30	7101
2013-09-30	9346
2013-12-31	7256
2014-03-31	3103
2014-06-30	3560
2014-09-30	2970
2014-12-31	4673
2015-03-31	4166
2015-06-30	5944
2015-09-30	7779
2015-12-31	6676
2016-03-31	6230
2016-06-30	7570
2016-09-30	7802
2016-12-31	6106
2017-03-31	4500
2017-06-30	4758
2017-09-30	6539
2017-12-31	6277
2018-03-31	6677
2018-06-30	5710
2018-09-30	6732
2018-12-31	6605
2019-03-31	7841
2019-06-30	8404
2019-09-30	8071
2019-12-31	6000
2020-03-31	6798
2020-06-30	7211
2020-09-30	7765
2020-12-31	7896
2021-03-31	9824
2021-06-30	9622
2021-09-30	8773
2021-12-31	10135
2022-03-31	12035
2022-06-30	11175
2022-09-30	11321
2022-12-31	11123
2023-03-31	11746
2023-06-30	11476
2023-09-30	10874