Quarter	US dollars
2004-12-31	4869
2005-03-31	5208
2005-06-30	4756
2005-09-30	4438
2005-12-31	4194
2006-03-31	4352
2006-06-30	4553
2006-09-30	4441
2006-12-31	5315
2007-03-31	4758
2007-06-30	5253
2007-09-30	6285
2007-12-31	6725
2008-03-31	8465
2008-06-30	9427
2008-09-30	13166
2008-12-31	11643
2009-03-31	11161
2009-06-30	10484
2009-09-30	9212
2009-12-31	9413
2010-03-31	9884
2010-06-30	11058
2010-09-30	13154
2010-12-31	13599
2011-03-31	14932
2011-06-30	18935
2011-09-30	18086
2011-12-31	16585
2012-03-31	20047
2012-06-30	17901
2012-09-30	17034
2012-12-31	21934
2013-03-31	17326
2013-06-30	16265
2013-09-30	20900
2013-12-31	18786
2014-03-31	17622
2014-06-30	15705
2014-09-30	16538
2014-12-31	17473
2015-03-31	17172
2015-06-30	13838
2015-09-30	12604
2015-12-31	11551
2016-03-31	10565
2016-06-30	11980
2016-09-30	11697
2016-12-31	11362
2017-03-31	10871
2017-06-30	9323
2017-09-30	10888
2017-12-31	11762
2018-03-31	11830
2018-06-30	11613
2018-09-30	13469
2018-12-31	13834
2019-03-31	12005
2019-06-30	14675
2019-09-30	16282
2019-12-31	13165
2020-03-31	14819
2020-06-30	9388
2020-09-30	8969
2020-12-31	12782
2021-03-31	11226
2021-06-30	10978
2021-09-30	10415
2021-12-31	21930
2022-03-31	15648
2022-06-30	10157
2022-09-30	22897
2022-12-31	21607
2023-03-31	24011
2023-06-30	24515
2023-09-30	13602