Quarter	US dollars
2004-12-31	16811
2005-03-31	16116
2005-06-30	14376
2005-09-30	16544
2005-12-31	16067
2006-03-31	21577
2006-06-30	23911
2006-09-30	27659
2006-12-31	23860
2007-03-31	26666
2007-06-30	26378
2007-09-30	33817
2007-12-31	38259
2008-03-31	45391
2008-06-30	55189
2008-09-30	52342
2008-12-31	49156
2009-03-31	52932
2009-06-30	63112
2009-09-30	62913
2009-12-31	60310
2010-03-31	61798
2010-06-30	59755
2010-09-30	63898
2010-12-31	67630
2011-03-31	74168
2011-06-30	79310
2011-09-30	71701
2011-12-31	71979
2012-03-31	73064
2012-06-30	71269
2012-09-30	65752
2012-12-31	61985
2013-03-31	59443
2013-06-30	56456
2013-09-30	71153
2013-12-31	76178
2014-03-31	63307
2014-06-30	63654
2014-09-30	59052
2014-12-31	63465
2015-03-31	61940
2015-06-30	67446
2015-09-30	64676
2015-12-31	56008
2016-03-31	60954
2016-06-30	64990
2016-09-30	62882
2016-12-31	63327
2017-03-31	61025
2017-06-30	60963
2017-09-30	60353
2017-12-31	58702
2018-03-31	66752
2018-06-30	63641
2018-09-30	67708
2018-12-31	68282
2019-03-31	66221
2019-06-30	65533
2019-09-30	69125
2019-12-31	65853
2020-03-31	70316
2020-06-30	75607
2020-09-30	75785
2020-12-31	76793
2021-03-31	81792
2021-06-30	79834
2021-09-30	73712
2021-12-31	78606
2022-03-31	69568
2022-06-30	70147
2022-09-30	74795
2022-12-31	87545
2023-03-31	84467
2023-06-30	84161
2023-09-30	85281