Quarter	US dollars
2004-12-31	13096
2005-03-31	15477
2005-06-30	149952
2005-09-30	199245
2005-12-31	177442
2006-03-31	216122
2006-06-30	273082
2006-09-30	329138
2006-12-31	350501
2007-03-31	382087
2007-06-30	430672
2007-09-30	494807
2007-12-31	518745
2008-03-31	567151
2008-06-30	507941
2008-09-30	448506
2008-12-31	359108
2009-03-31	360602
2009-06-30	311341
2009-09-30	243100
2009-12-31	219873
2010-03-31	220704
2010-06-30	221037
2010-09-30	277280
2010-12-31	349593
2011-03-31	338550
2011-06-30	330573
2011-09-30	306174
2011-12-31	289673
2012-03-31	190289
2012-06-30	229682
2012-09-30	221527
2012-12-31	185468
2013-03-31	632163
2013-06-30	596389
2013-09-30	580123
2013-12-31	521077
2014-03-31	426579
2014-06-30	390955
2014-09-30	386569
2014-12-31	318528
2015-03-31	319105
2015-06-30	293410
2015-09-30	284630
2015-12-31	245789
2016-03-31	246775
2016-06-30	225658
2016-09-30	221119
2016-12-31	180932
2017-03-31	182320
2017-06-30	181183
2017-09-30	156131
2017-12-31	127817
2018-03-31	147415
2018-06-30	113720
2018-09-30	109561
2018-12-31	112317
2019-03-31	121437
2019-06-30	193065
2019-09-30	177237
2019-12-31	199158
2020-03-31	197071
2020-06-30	170614
2020-09-30	182948
2020-12-31	170769
2021-03-31	197375
2021-06-30	203855
2021-09-30	259733
2021-12-31	288300
2022-03-31	373338
2022-06-30	313098
2022-09-30	335594
2022-12-31	333737
2023-03-31	385261
2023-06-30	389442
2023-09-30	383245