Quarter	US dollars
2004-12-31	1551
2005-03-31	1440
2005-06-30	887
2005-09-30	766
2005-12-31	774
2006-03-31	2118
2006-06-30	2774
2006-09-30	3118
2006-12-31	3063
2007-03-31	3458
2007-06-30	4262
2007-09-30	5146
2007-12-31	4818
2008-03-31	5239
2008-06-30	5423
2008-09-30	4922
2008-12-31	4110
2009-03-31	9425
2009-06-30	10146
2009-09-30	10154
2009-12-31	10164
2010-03-31	4084
2010-06-30	4110
2010-09-30	4355
2010-12-31	4311
2011-03-31	4282
2011-06-30	4553
2011-09-30	4618
2011-12-31	4176
2012-03-31	4531
2012-06-30	4389
2012-09-30	4496
2012-12-31	4213
2013-03-31	3853
2013-06-30	3419
2013-09-30	3352
2013-12-31	4340
2014-03-31	4845
2014-06-30	5016
2014-09-30	4619
2014-12-31	4988
2015-03-31	4619
2015-06-30	5010
2015-09-30	4667
2015-12-31	4541
2016-03-31	3172
2016-06-30	3015
2016-09-30	2893
2016-12-31	2721
2017-03-31	1999
2017-06-30	2129
2017-09-30	2156
2017-12-31	2152
2018-03-31	2181
2018-06-30	1992
2018-09-30	1909
2018-12-31	1839
2019-03-31	1824
2019-06-30	1538
2019-09-30	1497
2019-12-31	1616
2020-03-31	1513
2020-06-30	1473
2020-09-30	1521
2020-12-31	1590
2021-03-31	1712
2021-06-30	1708
2021-09-30	1669
2021-12-31	1620
2022-03-31	1577
2022-06-30	1515
2022-09-30	1493
2022-12-31	1501
2023-03-31	1496
2023-06-30	1459
2023-09-30	1456