Quarter	US dollars
2004-12-31	32202
2005-03-31	32935
2005-06-30	33310
2005-09-30	34090
2005-12-31	36685
2006-03-31	38931
2006-06-30	42054
2006-09-30	41954
2006-12-31	48177
2007-03-31	48344
2007-06-30	54941
2007-09-30	60831
2007-12-31	59189
2008-03-31	67587
2008-06-30	73865
2008-09-30	64605
2008-12-31	61475
2009-03-31	58849
2009-06-30	66196
2009-09-30	61287
2009-12-31	60455
2010-03-31	62532
2010-06-30	54450
2010-09-30	59738
2010-12-31	57548
2011-03-31	57811
2011-06-30	58315
2011-09-30	50911
2011-12-31	47609
2012-03-31	45728
2012-06-30	42253
2012-09-30	41593
2012-12-31	40092
2013-03-31	37752
2013-06-30	34050
2013-09-30	32884
2013-12-31	31633
2014-03-31	30672
2014-06-30	30568
2014-09-30	27095
2014-12-31	22355
2015-03-31	2169
2015-06-30	2366
2015-09-30	2530
2015-12-31	2672
2016-03-31	2807
2016-06-30	2573
2016-09-30	2310
2016-12-31	1640
2017-03-31	1411
2017-06-30	1659
2017-09-30	1661
2017-12-31	1835
2018-03-31	1967
2018-06-30	1763
2018-09-30	1781
2018-12-31	1422
2019-03-31	1355
2019-06-30	1098
2019-09-30	1131
2019-12-31	1139
2020-03-31	1232
2020-06-30	1331
2020-09-30	1334
2020-12-31	1297
2021-03-31	1057
2021-06-30	871
2021-09-30	814
2021-12-31	677
2022-03-31	607
2022-06-30	579
2022-09-30	443
2022-12-31	545
2023-03-31	610
2023-06-30	498
2023-09-30	303