Quarter	US dollars
2004-12-31	131778
2005-03-31	142220
2005-06-30	186802
2005-09-30	250513
2005-12-31	267375
2006-03-31	290442
2006-06-30	291342
2006-09-30	289283
2006-12-31	319512
2007-03-31	343986
2007-06-30	370203
2007-09-30	416498
2007-12-31	442028
2008-03-31	462376
2008-06-30	476756
2008-09-30	450882
2008-12-31	422107
2009-03-31	420087
2009-06-30	446240
2009-09-30	459760
2009-12-31	469191
2010-03-31	503136
2010-06-30	522157
2010-09-30	565203
2010-12-31	584143
2011-03-31	599907
2011-06-30	641635
2011-09-30	607897
2011-12-31	604941
2012-03-31	615545
2012-06-30	595373
2012-09-30	595958
2012-12-31	601634
2013-03-31	600580
2013-06-30	574059
2013-09-30	587774
2013-12-31	586964
2014-03-31	602317
2014-06-30	606926
2014-09-30	597790
2014-12-31	587156
2015-03-31	576080
2015-06-30	558993
2015-09-30	522191
2015-12-31	499752
2016-03-31	501154
2016-06-30	486974
2016-09-30	463295
2016-12-31	436977
2017-03-31	458971
2017-06-30	417631
2017-09-30	419505
2017-12-31	437242
2018-03-31	452386
2018-06-30	432864
2018-09-30	430065
2018-12-31	442262
2019-03-31	449982
2019-06-30	446552
2019-09-30	433062
2019-12-31	453120
2020-03-31	450342
2020-06-30	452101
2020-09-30	450690
2020-12-31	485975
2021-03-31	472107
2021-06-30	478675
2021-09-30	480288
2021-12-31	486673
2022-03-31	491344
2022-06-30	471144
2022-09-30	453966
2022-12-31	467998
2023-03-31	482965
2023-06-30	470996
2023-09-30	466650