Quarter	US dollars
1999-09-30	458
1999-12-31	498
2000-03-31	443
2000-06-30	494
2000-09-30	538
2000-12-31	610
2001-03-31	553
2001-06-30	592
2001-09-30	723
2001-12-31	786
2002-03-31	749
2002-06-30	778
2002-09-30	900
2002-12-31	1151
2003-03-31	1174
2003-06-30	1211
2003-09-30	1214
2003-12-31	1420
2004-03-31	1393
2004-06-30	1232
2004-09-30	1384
2004-12-31	1496
2005-03-31	1437
2005-06-30	1524
2005-09-30	1468
2005-12-31	1471
2006-03-31	1464
2006-06-30	1450
2006-09-30	1382
2006-12-31	1415
2007-03-31	2505
2007-06-30	2634
2007-09-30	3176
2007-12-31	2931
2008-03-31	4289
2008-06-30	4275
2008-09-30	4373
2008-12-31	4143
2009-03-31	4051
2009-06-30	4133
2009-09-30	4088
2009-12-31	3880
2010-03-31	4025
2010-06-30	3977
2010-09-30	4018
2010-12-31	4037
2011-03-31	3887
2011-06-30	4415
2011-09-30	4387
2011-12-31	5241
2012-03-31	4721
2012-06-30	4907
2012-09-30	4883
2012-12-31	4839
2013-03-31	4825
2013-06-30	4392
2013-09-30	4691
2013-12-31	5091
2014-03-31	4964
2014-06-30	4808
2014-09-30	4833
2014-12-31	4804
2015-03-31	4858
2015-06-30	4566
2015-09-30	4367
2015-12-31	4309
2016-03-31	4043
2016-06-30	3810
2016-09-30	3975
2016-12-31	3962
2017-03-31	4256
2017-06-30	3033
2017-09-30	3267
2017-12-31	3319
2018-03-31	3306
2018-06-30	3319
2018-09-30	2829
2018-12-31	2916
2019-03-31	3897
2019-06-30	3706
2019-09-30	3335
2019-12-31	3839
2020-03-31	3881
2020-06-30	3433
2020-09-30	4675
2020-12-31	3139
2021-03-31	3180
2021-06-30	3435
2021-09-30	3422
2021-12-31	3768
2022-03-31	3567
2022-06-30	4973
2022-09-30	5910
2022-12-31	5555
2023-03-31	4954
2023-06-30	4606
2023-09-30	4727