Quarter	US dollars
2004-12-31	22797
2005-03-31	30832
2005-06-30	30404
2005-09-30	33533
2005-12-31	27908
2006-03-31	35269
2006-06-30	40826
2006-09-30	43290
2006-12-31	44285
2007-03-31	50629
2007-06-30	52303
2007-09-30	62165
2007-12-31	62928
2008-03-31	71822
2008-06-30	66290
2008-09-30	54974
2008-12-31	75915
2009-03-31	64942
2009-06-30	65067
2009-09-30	70136
2009-12-31	68198
2010-03-31	59421
2010-06-30	66716
2010-09-30	94291
2010-12-31	72959
2011-03-31	77337
2011-06-30	79108
2011-09-30	77398
2011-12-31	73319
2012-03-31	74035
2012-06-30	73392
2012-09-30	76963
2012-12-31	78688
2013-03-31	73415
2013-06-30	67463
2013-09-30	67548
2013-12-31	62040
2014-03-31	62379
2014-06-30	64050
2014-09-30	61447
2014-12-31	59836
2015-03-31	64945
2015-06-30	53936
2015-09-30	51388
2015-12-31	44546
2016-03-31	53056
2016-06-30	50982
2016-09-30	51217
2016-12-31	42491
2017-03-31	43083
2017-06-30	48151
2017-09-30	44670
2017-12-31	44175
2018-03-31	44412
2018-06-30	39443
2018-09-30	41234
2018-12-31	38304
2019-03-31	42437
2019-06-30	46801
2019-09-30	54153
2019-12-31	50536
2020-03-31	55006
2020-06-30	56274
2020-09-30	54975
2020-12-31	56334
2021-03-31	46040
2021-06-30	46570
2021-09-30	48614
2021-12-31	45110
2022-03-31	42941
2022-06-30	32713
2022-09-30	31943
2022-12-31	35510
2023-03-31	37250
2023-06-30	40999
2023-09-30	39927