Quarter	US dollars
1999-03-31	803
1999-06-30	954
1999-09-30	1057
1999-12-31	933
2000-03-31	1035
2000-06-30	927
2000-09-30	872
2000-12-31	868
2001-03-31	938
2001-06-30	895
2001-09-30	876
2001-12-31	774
2002-03-31	747
2002-06-30	818
2002-09-30	738
2002-12-31	675
2003-03-31	599
2003-06-30	617
2003-09-30	527
2003-12-31	517
2004-03-31	426
2004-06-30	405
2004-09-30	417
2004-12-31	458
2005-03-31	492
2005-06-30	427
2005-09-30	418
2005-12-31	704
2006-03-31	551
2006-06-30	595
2006-09-30	646
2006-12-31	1086
2007-03-31	688
2007-06-30	665
2007-09-30	605
2007-12-31	485
2008-03-31	651
2008-06-30	588
2008-09-30	814
2008-12-31	533
2009-03-31	492
2009-06-30	692
2009-09-30	481
2009-12-31	399
2010-03-31	643
2010-06-30	743
2010-09-30	801
2010-12-31	867
2011-03-31	699
2011-06-30	676
2011-09-30	808
2011-12-31	714
2012-03-31	707
2012-06-30	892
2012-09-30	897
2012-12-31	748
2013-03-31	870
2013-06-30	720
2013-09-30	623
2013-12-31	747
2014-03-31	825
2014-06-30	834
2014-09-30	712
2014-12-31	949
2015-03-31	840
2015-06-30	1075
2015-09-30	1256
2015-12-31	1175
2016-03-31	1299
2016-06-30	1442
2016-09-30	1627
2016-12-31	2848
2017-03-31	3166
2017-06-30	3081
2017-09-30	3164
2017-12-31	3504
2018-03-31	3220
2018-06-30	3055
2018-09-30	3117
2018-12-31	4088
2019-03-31	4360
2019-06-30	4983
2019-09-30	4155
2019-12-31	5662
2020-03-31	3301
2020-06-30	3132
2020-09-30	3119
2020-12-31	3317
2021-03-31	3576
2021-06-30	3903
2021-09-30	5863
2021-12-31	4182
2022-03-31	4716
2022-06-30	4322
2022-09-30	3896
2022-12-31	3642
2023-03-31	4006
2023-06-30	2981
2023-09-30	2122