Quarter	US dollars
2004-12-31	17381
2005-03-31	18702
2005-06-30	19008
2005-09-30	26182
2005-12-31	27989
2006-03-31	30442
2006-06-30	30360
2006-09-30	31655
2006-12-31	33073
2007-03-31	35286
2007-06-30	39309
2007-09-30	38918
2007-12-31	40447
2008-03-31	42513
2008-06-30	40694
2008-09-30	40862
2008-12-31	39679
2009-03-31	39394
2009-06-30	38932
2009-09-30	37576
2009-12-31	40688
2010-03-31	41734
2010-06-30	43427
2010-09-30	45258
2010-12-31	33749
2011-03-31	26116
2011-06-30	25192
2011-09-30	25402
2011-12-31	25518
2012-03-31	23286
2012-06-30	24252
2012-09-30	23319
2012-12-31	26085
2013-03-31	26523
2013-06-30	30052
2013-09-30	29059
2013-12-31	26592
2014-03-31	26457
2014-06-30	27689
2014-09-30	26297
2014-12-31	25527
2015-03-31	22848
2015-06-30	22159
2015-09-30	20901
2015-12-31	20352
2016-03-31	22881
2016-06-30	23710
2016-09-30	25405
2016-12-31	24759
2017-03-31	26600
2017-06-30	33942
2017-09-30	32991
2017-12-31	31693
2018-03-31	30198
2018-06-30	30322
2018-09-30	33111
2018-12-31	32940
2019-03-31	29446
2019-06-30	33042
2019-09-30	30525
2019-12-31	31176
2020-03-31	30335
2020-06-30	29343
2020-09-30	29863
2020-12-31	33593
2021-03-31	34730
2021-06-30	33273
2021-09-30	31980
2021-12-31	31684
2022-03-31	32155
2022-06-30	30570
2022-09-30	29762
2022-12-31	30044
2023-03-31	28741
2023-06-30	29117
2023-09-30	26689