Quarter	US dollars
2004-12-31	3504
2005-03-31	4482
2005-06-30	5055
2005-09-30	6709
2005-12-31	3907
2006-03-31	5826
2006-06-30	4145
2006-09-30	5147
2006-12-31	6358
2007-03-31	6798
2007-06-30	5514
2007-09-30	5330
2007-12-31	4374
2008-03-31	6769
2008-06-30	7254
2008-09-30	6059
2008-12-31	6892
2009-03-31	3647
2009-06-30	2747
2009-09-30	3726
2009-12-31	3089
2010-03-31	5166
2010-06-30	3365
2010-09-30	4192
2010-12-31	3444
2011-03-31	3717
2011-06-30	2420
2011-09-30	3254
2011-12-31	3183
2012-03-31	3127
2012-06-30	3255
2012-09-30	2967
2012-12-31	2956
2013-03-31	2563
2013-06-30	3778
2013-09-30	2322
2013-12-31	2182
2014-03-31	2993
2014-06-30	2365
2014-09-30	2549
2014-12-31	2720
2015-03-31	2079
2015-06-30	2655
2015-09-30	2489
2015-12-31	2387
2016-03-31	2410
2016-06-30	1458
2016-09-30	1530
2016-12-31	1278
2017-03-31	3304
2017-06-30	2816
2017-09-30	2455
2017-12-31	2124
2018-03-31	5017
2018-06-30	4468
2018-09-30	2999
2018-12-31	2095
2019-03-31	1957
2019-06-30	2907
2019-09-30	2287
2019-12-31	2069
2020-03-31	2431
2020-06-30	2741
2020-09-30	2935
2020-12-31	3307
2021-03-31	4429
2021-06-30	4191
2021-09-30	3924
2021-12-31	3296
2022-03-31	3626
2022-06-30	3711
2022-09-30	3889
2022-12-31	3637
2023-03-31	3876
2023-06-30	3136
2023-09-30	3560