Quarter	US dollars
2004-12-31	52239
2005-03-31	54814
2005-06-30	49572
2005-09-30	44618
2005-12-31	49912
2006-03-31	61271
2006-06-30	63516
2006-09-30	68481
2006-12-31	67922
2007-03-31	66015
2007-06-30	109728
2007-09-30	125891
2007-12-31	136162
2008-03-31	148868
2008-06-30	145862
2008-09-30	124072
2008-12-31	117903
2009-03-31	114794
2009-06-30	127790
2009-09-30	128531
2009-12-31	111382
2010-03-31	130201
2010-06-30	116135
2010-09-30	123915
2010-12-31	113433
2011-03-31	133148
2011-06-30	138546
2011-09-30	109907
2011-12-31	167814
2012-03-31	99643
2012-06-30	116097
2012-09-30	88377
2012-12-31	96293
2013-03-31	101447
2013-06-30	106832
2013-09-30	98505
2013-12-31	89967
2014-03-31	85412
2014-06-30	88467
2014-09-30	82801
2014-12-31	72743
2015-03-31	67009
2015-06-30	67676
2015-09-30	65936
2015-12-31	64552
2016-03-31	70461
2016-06-30	65413
2016-09-30	62166
2016-12-31	62331
2017-03-31	76598
2017-06-30	85548
2017-09-30	94540
2017-12-31	109619
2018-03-31	85384
2018-06-30	74450
2018-09-30	102536
2018-12-31	136280
2019-03-31	109793
2019-06-30	108567
2019-09-30	100807
2019-12-31	112868
2020-03-31	120660
2020-06-30	133101
2020-09-30	141139
2020-12-31	136302
2021-03-31	141602
2021-06-30	194958
2021-09-30	167102
2021-12-31	174454
2022-03-31	192178
2022-06-30	206187
2022-09-30	198790
2022-12-31	199527
2023-03-31	196238
2023-06-30	195339
2023-09-30	186763