Quarter	US dollars
2004-12-31	1426
2005-03-31	1363
2005-06-30	1441
2005-09-30	1381
2005-12-31	1365
2006-03-31	1370
2006-06-30	1332
2006-09-30	1270
2006-12-31	1344
2007-03-31	1345
2007-06-30	1980
2007-09-30	1897
2007-12-31	2080
2008-03-31	3442
2008-06-30	3718
2008-09-30	3400
2008-12-31	3318
2009-03-31	3620
2009-06-30	3709
2009-09-30	3717
2009-12-31	3444
2010-03-31	3331
2010-06-30	3530
2010-09-30	3444
2010-12-31	3336
2011-03-31	3017
2011-06-30	3100
2011-09-30	3301
2011-12-31	3700
2012-03-31	3167
2012-06-30	3415
2012-09-30	3254
2012-12-31	3162
2013-03-31	3109
2013-06-30	2992
2013-09-30	3161
2013-12-31	3583
2014-03-31	3396
2014-06-30	3399
2014-09-30	3328
2014-12-31	3231
2015-03-31	3355
2015-06-30	3026
2015-09-30	2996
2015-12-31	2842
2016-03-31	2768
2016-06-30	2723
2016-09-30	2883
2016-12-31	2550
2017-03-31	2738
2017-06-30	2844
2017-09-30	2935
2017-12-31	3033
2018-03-31	3052
2018-06-30	3091
2018-09-30	2476
2018-12-31	2527
2019-03-31	3211
2019-06-30	3232
2019-09-30	2904
2019-12-31	3153
2020-03-31	3111
2020-06-30	3264
2020-09-30	4008
2020-12-31	3026
2021-03-31	2968
2021-06-30	3137
2021-09-30	3308
2021-12-31	3232
2022-03-31	3354
2022-06-30	4800
2022-09-30	5682
2022-12-31	5284
2023-03-31	4760
2023-06-30	4585
2023-09-30	4617