Quarter	US dollars
2004-12-31	9697
2005-03-31	14032
2005-06-30	10395
2005-09-30	9525
2005-12-31	8657
2006-03-31	9574
2006-06-30	10040
2006-09-30	12130
2006-12-31	8169
2007-03-31	9991
2007-06-30	8413
2007-09-30	9798
2007-12-31	8147
2008-03-31	13511
2008-06-30	10609
2008-09-30	11894
2008-12-31	5162
2009-03-31	9881
2009-06-30	15735
2009-09-30	18832
2009-12-31	20831
2010-03-31	14736
2010-06-30	16105
2010-09-30	15517
2010-12-31	17134
2011-03-31	9182
2011-06-30	18400
2011-09-30	18531
2011-12-31	11307
2012-03-31	18257
2012-06-30	24142
2012-09-30	22896
2012-12-31	20682
2013-03-31	18112
2013-06-30	13996
2013-09-30	18129
2013-12-31	21703
2014-03-31	9837
2014-06-30	17711
2014-09-30	14250
2014-12-31	16423
2015-03-31	15212
2015-06-30	15089
2015-09-30	13476
2015-12-31	13865
2016-03-31	15619
2016-06-30	16953
2016-09-30	15914
2016-12-31	19965
2017-03-31	21328
2017-06-30	17056
2017-09-30	21643
2017-12-31	19369
2018-03-31	24772
2018-06-30	22832
2018-09-30	20710
2018-12-31	21585
2019-03-31	21285
2019-06-30	15900
2019-09-30	17659
2019-12-31	21679
2020-03-31	22789
2020-06-30	21126
2020-09-30	19345
2020-12-31	17061
2021-03-31	23591
2021-06-30	27152
2021-09-30	29584
2021-12-31	32342
2022-03-31	31168
2022-06-30	17546
2022-09-30	18119
2022-12-31	16044
2023-03-31	10426
2023-06-30	16103
2023-09-30	13326