Quarter	US dollars
2004-12-31	2064
2005-03-31	2042
2005-06-30	1730
2005-09-30	2165
2005-12-31	1909
2006-03-31	2373
2006-06-30	2373
2006-09-30	2475
2006-12-31	2626
2007-03-31	3322
2007-06-30	2996
2007-09-30	3502
2007-12-31	4022
2008-03-31	5271
2008-06-30	5224
2008-09-30	5209
2008-12-31	3843
2009-03-31	4959
2009-06-30	4639
2009-09-30	5959
2009-12-31	6718
2010-03-31	9968
2010-06-30	9200
2010-09-30	10008
2010-12-31	13102
2011-03-31	14276
2011-06-30	12914
2011-09-30	12831
2011-12-31	12646
2012-03-31	13985
2012-06-30	13659
2012-09-30	12315
2012-12-31	13251
2013-03-31	14803
2013-06-30	13808
2013-09-30	12424
2013-12-31	10905
2014-03-31	11084
2014-06-30	10855
2014-09-30	11363
2014-12-31	9875
2015-03-31	9615
2015-06-30	8689
2015-09-30	7726
2015-12-31	6725
2016-03-31	7265
2016-06-30	5789
2016-09-30	7335
2016-12-31	7809
2017-03-31	7463
2017-06-30	5484
2017-09-30	6638
2017-12-31	6284
2018-03-31	7345
2018-06-30	8397
2018-09-30	9936
2018-12-31	7733
2019-03-31	8768
2019-06-30	8791
2019-09-30	7585
2019-12-31	4860
2020-03-31	5239
2020-06-30	4872
2020-09-30	4182
2020-12-31	4772
2021-03-31	5701
2021-06-30	4954
2021-09-30	5487
2021-12-31	6966
2022-03-31	6631
2022-06-30	6693
2022-09-30	6751
2022-12-31	5526
2023-03-31	6307
2023-06-30	5507
2023-09-30	7011