Quarter	US dollars
2004-12-31	27059
2005-03-31	26418
2005-06-30	26931
2005-09-30	73943
2005-12-31	78699
2006-03-31	87493
2006-06-30	81335
2006-09-30	82460
2006-12-31	92065
2007-03-31	100103
2007-06-30	109064
2007-09-30	126042
2007-12-31	128146
2008-03-31	134021
2008-06-30	141295
2008-09-30	142500
2008-12-31	126214
2009-03-31	129237
2009-06-30	138852
2009-09-30	140586
2009-12-31	141476
2010-03-31	146944
2010-06-30	149053
2010-09-30	159162
2010-12-31	164304
2011-03-31	154515
2011-06-30	155483
2011-09-30	149773
2011-12-31	142773
2012-03-31	145072
2012-06-30	144912
2012-09-30	146812
2012-12-31	144489
2013-03-31	141001
2013-06-30	136412
2013-09-30	137392
2013-12-31	135521
2014-03-31	146879
2014-06-30	146949
2014-09-30	145498
2014-12-31	143650
2015-03-31	142381
2015-06-30	141531
2015-09-30	138400
2015-12-31	136158
2016-03-31	128902
2016-06-30	128904
2016-09-30	129357
2016-12-31	128651
2017-03-31	136007
2017-06-30	83052
2017-09-30	81791
2017-12-31	84216
2018-03-31	81892
2018-06-30	77173
2018-09-30	74945
2018-12-31	74409
2019-03-31	73616
2019-06-30	75528
2019-09-30	73597
2019-12-31	76016
2020-03-31	74429
2020-06-30	74294
2020-09-30	71143
2020-12-31	69887
2021-03-31	68590
2021-06-30	70322
2021-09-30	66662
2021-12-31	67355
2022-03-31	67206
2022-06-30	68440
2022-09-30	65159
2022-12-31	67450
2023-03-31	68150
2023-06-30	68956
2023-09-30	63902