Quarter	US dollars
2004-12-31	1726
2005-03-31	2057
2005-06-30	2051
2005-09-30	1932
2005-12-31	2175
2006-03-31	2218
2006-06-30	2153
2006-09-30	2107
2006-12-31	2174
2007-03-31	1981
2007-06-30	1928
2007-09-30	2396
2007-12-31	3036
2008-03-31	2991
2008-06-30	2838
2008-09-30	2999
2008-12-31	2487
2009-03-31	2915
2009-06-30	2772
2009-09-30	3027
2009-12-31	3002
2010-03-31	3111
2010-06-30	3009
2010-09-30	3713
2010-12-31	4510
2011-03-31	3915
2011-06-30	3765
2011-09-30	4738
2011-12-31	4400
2012-03-31	4475
2012-06-30	4397
2012-09-30	5444
2012-12-31	5504
2013-03-31	5502
2013-06-30	4826
2013-09-30	5916
2013-12-31	5494
2014-03-31	5520
2014-06-30	5155
2014-09-30	4941
2014-12-31	4643
2015-03-31	4399
2015-06-30	4491
2015-09-30	4340
2015-12-31	3989
2016-03-31	4086
2016-06-30	3768
2016-09-30	3566
2016-12-31	3424
2017-03-31	3526
2017-06-30	3248
2017-09-30	3630
2017-12-31	3360
2018-03-31	3118
2018-06-30	2824
2018-09-30	2741
2018-12-31	2952
2019-03-31	3631
2019-06-30	3288
2019-09-30	3435
2019-12-31	3407
2020-03-31	3360
2020-06-30	3569
2020-09-30	3747
2020-12-31	3745
2021-03-31	3964
2021-06-30	4306
2021-09-30	3217
2021-12-31	3193
2022-03-31	2821
2022-06-30	2650
2022-09-30	2755
2022-12-31	2893
2023-03-31	3340
2023-06-30	2910
2023-09-30	3047