Quarter	US dollars
2004-12-31	28203
2005-03-31	39179
2005-06-30	28434
2005-09-30	45343
2005-12-31	29730
2006-03-31	37505
2006-06-30	43740
2006-09-30	54764
2006-12-31	51293
2007-03-31	57851
2007-06-30	68294
2007-09-30	79452
2007-12-31	82274
2008-03-31	97183
2008-06-30	91608
2008-09-30	91587
2008-12-31	66802
2009-03-31	58493
2009-06-30	60380
2009-09-30	75164
2009-12-31	80304
2010-03-31	102867
2010-06-30	118463
2010-09-30	134485
2010-12-31	145701
2011-03-31	162584
2011-06-30	195519
2011-09-30	190530
2011-12-31	180722
2012-03-31	184141
2012-06-30	180016
2012-09-30	174017
2012-12-31	179691
2013-03-31	202109
2013-06-30	207513
2013-09-30	211999
2013-12-31	206228
2014-03-31	222853
2014-06-30	212659
2014-09-30	209206
2014-12-31	192055
2015-03-31	185715
2015-06-30	175462
2015-09-30	156456
2015-12-31	142495
2016-03-31	143937
2016-06-30	144571
2016-09-30	141993
2016-12-31	138742
2017-03-31	157456
2017-06-30	185548
2017-09-30	181693
2017-12-31	186102
2018-03-31	188307
2018-06-30	181762
2018-09-30	180767
2018-12-31	180759
2019-03-31	194173
2019-06-30	198151
2019-09-30	189390
2019-12-31	183017
2020-03-31	186425
2020-06-30	174231
2020-09-30	171220
2020-12-31	190911
2021-03-31	202889
2021-06-30	212571
2021-09-30	204772
2021-12-31	215647
2022-03-31	199265
2022-06-30	197966
2022-09-30	197561
2022-12-31	192426
2023-03-31	199168
2023-06-30	203358
2023-09-30	205019