Quarter	US dollars
2004-12-31	184007
2005-03-31	159123
2005-06-30	211951
2005-09-30	195417
2005-12-31	171439
2006-03-31	156015
2006-06-30	190641
2006-09-30	160278
2006-12-31	167866
2007-03-31	209449
2007-06-30	278912
2007-09-30	315314
2007-12-31	363946
2008-03-31	586949
2008-06-30	621257
2008-09-30	575458
2008-12-31	1059457
2009-03-31	832936
2009-06-30	647879
2009-09-30	663193
2009-12-31	558454
2010-03-31	550799
2010-06-30	618671
2010-09-30	723635
2010-12-31	596498
2011-03-31	473792
2011-06-30	508977
2011-09-30	695436
2011-12-31	652508
2012-03-31	624515
2012-06-30	601817
2012-09-30	456692
2012-12-31	457140
2013-03-31	419193
2013-06-30	349231
2013-09-30	303684
2013-12-31	278298
2014-03-31	303789
2014-06-30	352974
2014-09-30	382029
2014-12-31	400806
2015-03-31	421750
2015-06-30	322106
2015-09-30	322651
2015-12-31	276644
2016-03-31	324700
2016-06-30	331242
2016-09-30	306947
2016-12-31	248252
2017-03-31	216386
2017-06-30	208265
2017-09-30	199362
2017-12-31	181019
2018-03-31	180021
2018-06-30	115872
2018-09-30	155876
2018-12-31	178179
2019-03-31	187966
2019-06-30	191242
2019-09-30	244832
2019-12-31	210035
2020-03-31	260846
2020-06-30	252861
2020-09-30	245919
2020-12-31	254185
2021-03-31	215663
2021-06-30	190660
2021-09-30	175873
2021-12-31	160941
2022-03-31	157117
2022-06-30	168921
2022-09-30	192216
2022-12-31	166804
2023-03-31	154398
2023-06-30	154526
2023-09-30	162654