Quarter	US dollars
2004-12-31	16407
2005-03-31	13783
2005-06-30	13440
2005-09-30	15364
2005-12-31	10818
2006-03-31	13035
2006-06-30	14640
2006-09-30	17193
2006-12-31	17541
2007-03-31	22424
2007-06-30	21677
2007-09-30	24433
2007-12-31	24673
2008-03-31	28246
2008-06-30	27370
2008-09-30	25181
2008-12-31	33542
2009-03-31	28112
2009-06-30	31153
2009-09-30	33841
2009-12-31	31747
2010-03-31	40872
2010-06-30	72684
2010-09-30	75534
2010-12-31	66457
2011-03-31	62296
2011-06-30	70139
2011-09-30	95694
2011-12-31	95221
2012-03-31	136321
2012-06-30	107662
2012-09-30	89033
2012-12-31	101014
2013-03-31	68267
2013-06-30	73938
2013-09-30	59383
2013-12-31	48209
2014-03-31	63156
2014-06-30	39203
2014-09-30	27833
2014-12-31	38358
2015-03-31	24542
2015-06-30	35901
2015-09-30	34405
2015-12-31	42704
2016-03-31	46464
2016-06-30	86447
2016-09-30	86879
2016-12-31	54559
2017-03-31	57947
2017-06-30	72189
2017-09-30	72603
2017-12-31	81899
2018-03-31	81272
2018-06-30	76769
2018-09-30	65408
2018-12-31	39581
2019-03-31	26748
2019-06-30	19176
2019-09-30	18818
2019-12-31	21444
2020-03-31	21937
2020-06-30	23773
2020-09-30	23369
2020-12-31	26090
2021-03-31	24078
2021-06-30	23672
2021-09-30	25617
2021-12-31	24550
2022-03-31	24826
2022-06-30	24228
2022-09-30	24096
2022-12-31	25536
2023-03-31	26554
2023-06-30	31395
2023-09-30	34108