Quarter	US dollars
2004-12-31	1745
2005-03-31	1885
2005-06-30	1927
2005-09-30	2107
2005-12-31	2235
2006-03-31	2345
2006-06-30	2291
2006-09-30	2232
2006-12-31	2292
2007-03-31	2083
2007-06-30	3096
2007-09-30	3500
2007-12-31	2941
2008-03-31	3518
2008-06-30	3725
2008-09-30	3689
2008-12-31	3708
2009-03-31	3951
2009-06-30	4810
2009-09-30	6221
2009-12-31	7859
2010-03-31	5700
2010-06-30	4761
2010-09-30	6297
2010-12-31	12612
2011-03-31	12635
2011-06-30	16780
2011-09-30	41275
2011-12-31	37392
2012-03-31	51577
2012-06-30	33548
2012-09-30	55430
2012-12-31	77233
2013-03-31	78937
2013-06-30	100123
2013-09-30	95211
2013-12-31	76640
2014-03-31	89202
2014-06-30	86432
2014-09-30	74257
2014-12-31	66796
2015-03-31	56285
2015-06-30	55668
2015-09-30	49650
2015-12-31	46355
2016-03-31	46996
2016-06-30	43257
2016-09-30	42301
2016-12-31	39344
2017-03-31	39742
2017-06-30	37148
2017-09-30	37401
2017-12-31	37932
2018-03-31	34576
2018-06-30	33793
2018-09-30	32343
2018-12-31	33161
2019-03-31	32886
2019-06-30	33657
2019-09-30	32675
2019-12-31	30795
2020-03-31	30242
2020-06-30	30491
2020-09-30	30807
2020-12-31	30548
2021-03-31	32178
2021-06-30	28504
2021-09-30	29914
2021-12-31	30155
2022-03-31	31135
2022-06-30	30429
2022-09-30	29794
2022-12-31	28281
2023-03-31	28918
2023-06-30	24846
2023-09-30	24485