Quarter	US dollars
2004-12-31	971
2005-03-31	1210
2005-06-30	1188
2005-09-30	1281
2005-12-31	1373
2006-03-31	1426
2006-06-30	1443
2006-09-30	1242
2006-12-31	1327
2007-03-31	1587
2007-06-30	1786
2007-09-30	2052
2007-12-31	1905
2008-03-31	3126
2008-06-30	2249
2008-09-30	2345
2008-12-31	2382
2009-03-31	2429
2009-06-30	2312
2009-09-30	2306
2009-12-31	2138
2010-03-31	2134
2010-06-30	2361
2010-09-30	2774
2010-12-31	2558
2011-03-31	2648
2011-06-30	2484
2011-09-30	2421
2011-12-31	2579
2012-03-31	2618
2012-06-30	4583
2012-09-30	4795
2012-12-31	4839
2013-03-31	4371
2013-06-30	4315
2013-09-30	4236
2013-12-31	4168
2014-03-31	4242
2014-06-30	4502
2014-09-30	4489
2014-12-31	4506
2015-03-31	4508
2015-06-30	4193
2015-09-30	3743
2015-12-31	3598
2016-03-31	3836
2016-06-30	3759
2016-09-30	3624
2016-12-31	3425
2017-03-31	3317
2017-06-30	3724
2017-09-30	3972
2017-12-31	4245
2018-03-31	4106
2018-06-30	3944
2018-09-30	3697
2018-12-31	3872
2019-03-31	4303
2019-06-30	4658
2019-09-30	4848
2019-12-31	5057
2020-03-31	4895
2020-06-30	4666
2020-09-30	4408
2020-12-31	4380
2021-03-31	4335
2021-06-30	4247
2021-09-30	4421
2021-12-31	4198
2022-03-31	3991
2022-06-30	4008
2022-09-30	3944
2022-12-31	3656
2023-03-31	3515
2023-06-30	3576
2023-09-30	1049