Quarter	US dollars
1999-09-30	919
1999-12-31	724
2000-03-31	844
2000-06-30	812
2000-09-30	779
2000-12-31	644
2001-03-31	994
2001-06-30	722
2001-09-30	713
2001-12-31	630
2002-03-31	696
2002-06-30	539
2002-09-30	516
2002-12-31	616
2003-03-31	725
2003-06-30	840
2003-09-30	816
2003-12-31	804
2004-03-31	605
2004-06-30	843
2004-09-30	697
2004-12-31	753
2005-03-31	1009
2005-06-30	1031
2005-09-30	1183
2005-12-31	1085
2006-03-31	1547
2006-06-30	1418
2006-09-30	2492
2006-12-31	1857
2007-03-31	1802
2007-06-30	865
2007-09-30	1567
2007-12-31	2732
2008-03-31	1677
2008-06-30	3182
2008-09-30	2712
2008-12-31	2231
2009-03-31	2644
2009-06-30	3420
2009-09-30	3674
2009-12-31	3076
2010-03-31	2751
2010-06-30	5219
2010-09-30	7480
2010-12-31	5719
2011-03-31	8884
2011-06-30	9765
2011-09-30	6387
2011-12-31	5558
2012-03-31	7920
2012-06-30	6640
2012-09-30	7007
2012-12-31	6179
2013-03-31	6704
2013-06-30	6464
2013-09-30	6045
2013-12-31	8259
2014-03-31	6808
2014-06-30	8075
2014-09-30	7913
2014-12-31	7191
2015-03-31	6415
2015-06-30	8034
2015-09-30	6824
2015-12-31	4984
2016-03-31	3665
2016-06-30	9960
2016-09-30	9734
2016-12-31	8875
2017-03-31	9557
2017-06-30	6252
2017-09-30	4781
2017-12-31	6629
2018-03-31	7656
2018-06-30	3335
2018-09-30	3440
2018-12-31	2652
2019-03-31	3158
2019-06-30	3582
2019-09-30	3304
2019-12-31	3185
2020-03-31	2946
2020-06-30	2799
2020-09-30	3413
2020-12-31	3332
2021-03-31	3490
2021-06-30	3263
2021-09-30	2825
2021-12-31	2651
2022-03-31	2813
2022-06-30	2535
2022-09-30	2393
2022-12-31	2262
2023-03-31	2338
2023-06-30	2538
2023-09-30	5417