Quarter	US dollars
2004-12-31	132940
2005-03-31	148941
2005-06-30	131535
2005-09-30	136079
2005-12-31	124321
2006-03-31	148699
2006-06-30	141042
2006-09-30	156499
2006-12-31	171151
2007-03-31	197426
2007-06-30	197973
2007-09-30	231251
2007-12-31	202267
2008-03-31	220815
2008-06-30	163343
2008-09-30	170604
2008-12-31	94764
2009-03-31	83428
2009-06-30	89752
2009-09-30	69011
2009-12-31	63565
2010-03-31	64555
2010-06-30	53548
2010-09-30	63964
2010-12-31	50625
2011-03-31	53936
2011-06-30	55685
2011-09-30	39314
2011-12-31	28983
2012-03-31	27671
2012-06-30	27322
2012-09-30	34428
2012-12-31	34436
2013-03-31	35270
2013-06-30	26539
2013-09-30	26652
2013-12-31	24478
2014-03-31	40017
2014-06-30	37506
2014-09-30	39959
2014-12-31	34100
2015-03-31	32834
2015-06-30	31252
2015-09-30	31372
2015-12-31	26305
2016-03-31	30476
2016-06-30	31189
2016-09-30	29653
2016-12-31	29113
2017-03-31	33506
2017-06-30	36077
2017-09-30	32437
2017-12-31	31550
2018-03-31	35997
2018-06-30	31671
2018-09-30	32902
2018-12-31	28066
2019-03-31	31831
2019-06-30	24134
2019-09-30	24321
2019-12-31	28530
2020-03-31	30776
2020-06-30	28164
2020-09-30	28567
2020-12-31	26344
2021-03-31	29777
2021-06-30	33199
2021-09-30	35769
2021-12-31	33122
2022-03-31	31153
2022-06-30	30201
2022-09-30	32263
2022-12-31	30455
2023-03-31	35587
2023-06-30	33384
2023-09-30	31790