Quarter	US dollars
2004-12-31	50829
2005-03-31	54459
2005-06-30	54438
2005-09-30	57201
2005-12-31	55331
2006-03-31	58498
2006-06-30	64145
2006-09-30	65822
2006-12-31	70611
2007-03-31	77242
2007-06-30	91243
2007-09-30	100246
2007-12-31	107274
2008-03-31	120709
2008-06-30	126897
2008-09-30	110795
2008-12-31	60060
2009-03-31	63033
2009-06-30	62376
2009-09-30	66820
2009-12-31	60568
2010-03-31	63295
2010-06-30	67676
2010-09-30	67545
2010-12-31	68260
2011-03-31	68514
2011-06-30	67286
2011-09-30	59136
2011-12-31	58603
2012-03-31	55026
2012-06-30	52638
2012-09-30	52885
2012-12-31	50373
2013-03-31	51499
2013-06-30	48023
2013-09-30	47503
2013-12-31	38186
2014-03-31	34970
2014-06-30	37393
2014-09-30	34215
2014-12-31	32713
2015-03-31	30497
2015-06-30	30031
2015-09-30	26860
2015-12-31	25747
2016-03-31	27164
2016-06-30	27634
2016-09-30	27208
2016-12-31	27415
2017-03-31	30112
2017-06-30	31397
2017-09-30	31435
2017-12-31	30819
2018-03-31	31953
2018-06-30	32432
2018-09-30	35285
2018-12-31	34784
2019-03-31	37908
2019-06-30	37303
2019-09-30	37158
2019-12-31	39268
2020-03-31	36544
2020-06-30	35865
2020-09-30	38146
2020-12-31	41995
2021-03-31	40718
2021-06-30	38768
2021-09-30	39493
2021-12-31	43657
2022-03-31	47514
2022-06-30	47181
2022-09-30	48738
2022-12-31	50024
2023-03-31	51624
2023-06-30	51972
2023-09-30	53732