Quarter	US dollars
2004-12-31	1334
2005-03-31	1274
2005-06-30	1339
2005-09-30	1406
2005-12-31	1418
2006-03-31	1372
2006-06-30	1483
2006-09-30	1513
2006-12-31	1550
2007-03-31	1687
2007-06-30	1792
2007-09-30	1850
2007-12-31	1814
2008-03-31	1920
2008-06-30	1974
2008-09-30	2226
2008-12-31	2205
2009-03-31	2281
2009-06-30	2284
2009-09-30	2386
2009-12-31	2508
2010-03-31	2544
2010-06-30	2493
2010-09-30	2589
2010-12-31	2661
2011-03-31	2831
2011-06-30	2850
2011-09-30	3044
2011-12-31	2800
2012-03-31	3024
2012-06-30	3184
2012-09-30	3198
2012-12-31	3541
2013-03-31	3549
2013-06-30	3578
2013-09-30	3856
2013-12-31	3939
2014-03-31	4152
2014-06-30	4196
2014-09-30	4338
2014-12-31	4275
2015-03-31	4252
2015-06-30	4288
2015-09-30	4300
2015-12-31	4243
2016-03-31	4426
2016-06-30	4285
2016-09-30	4305
2016-12-31	4211
2017-03-31	4286
2017-06-30	4452
2017-09-30	4710
2017-12-31	4693
2018-03-31	4580
2018-06-30	4620
2018-09-30	4772
2018-12-31	5438
2019-03-31	5191
2019-06-30	5162
2019-09-30	5291
2019-12-31	5259
2020-03-31	5435
2020-06-30	5826
2020-09-30	5681
2020-12-31	5920
2021-03-31	6054
2021-06-30	5913
2021-09-30	5893
2021-12-31	6202
2022-03-31	6406
2022-06-30	5916
2022-09-30	6051
2022-12-31	6241
2023-03-31	6301
2023-06-30	6033
2023-09-30	6040