Quarter	US dollars
2004-12-31	10606
2005-03-31	10775
2005-06-30	11126
2005-09-30	12884
2005-12-31	13813
2006-03-31	17272
2006-06-30	16452
2006-09-30	18583
2006-12-31	19128
2007-03-31	22322
2007-06-30	25820
2007-09-30	31633
2007-12-31	32744
2008-03-31	37554
2008-06-30	39913
2008-09-30	40222
2008-12-31	34344
2009-03-31	35565
2009-06-30	35433
2009-09-30	34665
2009-12-31	35626
2010-03-31	37491
2010-06-30	41524
2010-09-30	42156
2010-12-31	40334
2011-03-31	38241
2011-06-30	40050
2011-09-30	40399
2011-12-31	38920
2012-03-31	37404
2012-06-30	38189
2012-09-30	39160
2012-12-31	37267
2013-03-31	36679
2013-06-30	36367
2013-09-30	34537
2013-12-31	37011
2014-03-31	43702
2014-06-30	44526
2014-09-30	44221
2014-12-31	41639
2015-03-31	40990
2015-06-30	39741
2015-09-30	39790
2015-12-31	39294
2016-03-31	38142
2016-06-30	36722
2016-09-30	34968
2016-12-31	34152
2017-03-31	35986
2017-06-30	33588
2017-09-30	33570
2017-12-31	33863
2018-03-31	34429
2018-06-30	33270
2018-09-30	32425
2018-12-31	32696
2019-03-31	32632
2019-06-30	32534
2019-09-30	34300
2019-12-31	33947
2020-03-31	33078
2020-06-30	34221
2020-09-30	32001
2020-12-31	31260
2021-03-31	29624
2021-06-30	29776
2021-09-30	27863
2021-12-31	28245
2022-03-31	28616
2022-06-30	29700
2022-09-30	28474
2022-12-31	30714
2023-03-31	29237
2023-06-30	27978
2023-09-30	27297