Quarter	US dollars
2004-12-31	7019
2005-03-31	6390
2005-06-30	6505
2005-09-30	7241
2005-12-31	6926
2006-03-31	9491
2006-06-30	10759
2006-09-30	11103
2006-12-31	13186
2007-03-31	17526
2007-06-30	16836
2007-09-30	18337
2007-12-31	17976
2008-03-31	18496
2008-06-30	16785
2008-09-30	14857
2008-12-31	12425
2009-03-31	13530
2009-06-30	15370
2009-09-30	8836
2009-12-31	14217
2010-03-31	17477
2010-06-30	18049
2010-09-30	19713
2010-12-31	20098
2011-03-31	20490
2011-06-30	20027
2011-09-30	14618
2011-12-31	15554
2012-03-31	16269
2012-06-30	15241
2012-09-30	14444
2012-12-31	14973
2013-03-31	11893
2013-06-30	12569
2013-09-30	12335
2013-12-31	13259
2014-03-31	14929
2014-06-30	14902
2014-09-30	14148
2014-12-31	14840
2015-03-31	13751
2015-06-30	14752
2015-09-30	13664
2015-12-31	12464
2016-03-31	13508
2016-06-30	14051
2016-09-30	12881
2016-12-31	11090
2017-03-31	11389
2017-06-30	13404
2017-09-30	13318
2017-12-31	13145
2018-03-31	13334
2018-06-30	10799
2018-09-30	10237
2018-12-31	9665
2019-03-31	11066
2019-06-30	9540
2019-09-30	9305
2019-12-31	10559
2020-03-31	9718
2020-06-30	9505
2020-09-30	9697
2020-12-31	10321
2021-03-31	9812
2021-06-30	9716
2021-09-30	9754
2021-12-31	9228
2022-03-31	9150
2022-06-30	9576
2022-09-30	7875
2022-12-31	8899
2023-03-31	9238
2023-06-30	9982
2023-09-30	9866