Quarter	US dollars
2004-12-31	1296
2005-03-31	1267
2005-06-30	1325
2005-09-30	1272
2005-12-31	1337
2006-03-31	1329
2006-06-30	1352
2006-09-30	1297
2006-12-31	1323
2007-03-31	2375
2007-06-30	2554
2007-09-30	3072
2007-12-31	2833
2008-03-31	3472
2008-06-30	3546
2008-09-30	3771
2008-12-31	3653
2009-03-31	3518
2009-06-30	3541
2009-09-30	3573
2009-12-31	3302
2010-03-31	3446
2010-06-30	3468
2010-09-30	3499
2010-12-31	3444
2011-03-31	3413
2011-06-30	3927
2011-09-30	3859
2011-12-31	4757
2012-03-31	4291
2012-06-30	4505
2012-09-30	4436
2012-12-31	4428
2013-03-31	4392
2013-06-30	3871
2013-09-30	3993
2013-12-31	4390
2014-03-31	4228
2014-06-30	4062
2014-09-30	4132
2014-12-31	4258
2015-03-31	4378
2015-06-30	4025
2015-09-30	3826
2015-12-31	3782
2016-03-31	3491
2016-06-30	3270
2016-09-30	3453
2016-12-31	3255
2017-03-31	3722
2017-06-30	2732
2017-09-30	2964
2017-12-31	2906
2018-03-31	2985
2018-06-30	2931
2018-09-30	2327
2018-12-31	2404
2019-03-31	3310
2019-06-30	3126
2019-09-30	2815
2019-12-31	3351
2020-03-31	3333
2020-06-30	2885
2020-09-30	3951
2020-12-31	2475
2021-03-31	2362
2021-06-30	2508
2021-09-30	2482
2021-12-31	2854
2022-03-31	2661
2022-06-30	3470
2022-09-30	3805
2022-12-31	3604
2023-03-31	3493
2023-06-30	2983
2023-09-30	3072