Quarter	US dollars
2004-12-31	5748
2005-03-31	6650
2005-06-30	38388
2005-09-30	40332
2005-12-31	44060
2006-03-31	44370
2006-06-30	44680
2006-09-30	44738
2006-12-31	46406
2007-03-31	46194
2007-06-30	46227
2007-09-30	47854
2007-12-31	46625
2008-03-31	46325
2008-06-30	45135
2008-09-30	42614
2008-12-31	41062
2009-03-31	38866
2009-06-30	41527
2009-09-30	46869
2009-12-31	48672
2010-03-31	52419
2010-06-30	51926
2010-09-30	56107
2010-12-31	56488
2011-03-31	55531
2011-06-30	57119
2011-09-30	50057
2011-12-31	48755
2012-03-31	50706
2012-06-30	49888
2012-09-30	50231
2012-12-31	48465
2013-03-31	43024
2013-06-30	40807
2013-09-30	41983
2013-12-31	41252
2014-03-31	38980
2014-06-30	40426
2014-09-30	39758
2014-12-31	38747
2015-03-31	38889
2015-06-30	38772
2015-09-30	38130
2015-12-31	38249
2016-03-31	38854
2016-06-30	39536
2016-09-30	40962
2016-12-31	39365
2017-03-31	45314
2017-06-30	43466
2017-09-30	44345
2017-12-31	46866
2018-03-31	46679
2018-06-30	43720
2018-09-30	45445
2018-12-31	45308
2019-03-31	44650
2019-06-30	44357
2019-09-30	45718
2019-12-31	48573
2020-03-31	48930
2020-06-30	49086
2020-09-30	52163
2020-12-31	59070
2021-03-31	58477
2021-06-30	57759
2021-09-30	57921
2021-12-31	57293
2022-03-31	56372
2022-06-30	53022
2022-09-30	48298
2022-12-31	54845
2023-03-31	52053
2023-06-30	50050
2023-09-30	48432