Quarter	US dollars
1999-09-30	1044
1999-12-31	1043
2000-03-31	780
2000-06-30	657
2000-09-30	770
2000-12-31	1002
2001-03-31	1380
2001-06-30	1407
2001-09-30	1389
2001-12-31	1460
2002-03-31	1044
2002-06-30	2054
2002-09-30	1893
2002-12-31	2162
2003-03-31	2061
2003-06-30	2480
2003-09-30	3565
2003-12-31	3325
2004-03-31	3203
2004-06-30	2193
2004-09-30	2177
2004-12-31	4016
2005-03-31	3223
2005-06-30	3051
2005-09-30	2938
2005-12-31	3042
2006-03-31	3545
2006-06-30	4180
2006-09-30	3800
2006-12-31	2605
2007-03-31	3481
2007-06-30	3778
2007-09-30	4535
2007-12-31	7418
2008-03-31	13668
2008-06-30	9554
2008-09-30	10466
2008-12-31	13605
2009-03-31	9914
2009-06-30	7075
2009-09-30	7184
2009-12-31	6194
2010-03-31	5906
2010-06-30	8099
2010-09-30	9592
2010-12-31	7718
2011-03-31	6537
2011-06-30	8225
2011-09-30	10452
2011-12-31	8134
2012-03-31	6512
2012-06-30	6943
2012-09-30	7506
2012-12-31	6040
2013-03-31	5872
2013-06-30	5665
2013-09-30	6811
2013-12-31	6016
2014-03-31	5665
2014-06-30	6432
2014-09-30	6545
2014-12-31	6562
2015-03-31	6365
2015-06-30	5626
2015-09-30	7549
2015-12-31	7321
2016-03-31	6276
2016-06-30	7582
2016-09-30	5613
2016-12-31	8829
2017-03-31	4901
2017-06-30	4217
2017-09-30	4096
2017-12-31	4180
2018-03-31	5191
2018-06-30	2687
2018-09-30	4858
2018-12-31	4348
2019-03-31	3788
2019-06-30	5101
2019-09-30	5256
2019-12-31	3799
2020-03-31	7282
2020-06-30	6430
2020-09-30	6227
2020-12-31	7705
2021-03-31	6708
2021-06-30	6275
2021-09-30	5136
2021-12-31	4232
2022-03-31	4497
2022-06-30	6012
2022-09-30	8731
2022-12-31	6755
2023-03-31	4990
2023-06-30	5832
2023-09-30	6573