Quarter	US dollars
2004-12-31	3058
2005-03-31	2548
2005-06-30	1991
2005-09-30	1641
2005-12-31	1737
2006-03-31	1656
2006-06-30	1848
2006-09-30	1625
2006-12-31	1701
2007-03-31	2077
2007-06-30	2335
2007-09-30	2803
2007-12-31	1927
2008-03-31	3351
2008-06-30	3284
2008-09-30	2780
2008-12-31	2040
2009-03-31	2492
2009-06-30	2309
2009-09-30	2935
2009-12-31	2643
2010-03-31	2578
2010-06-30	4560
2010-09-30	4782
2010-12-31	4250
2011-03-31	3777
2011-06-30	2930
2011-09-30	2575
2011-12-31	2403
2012-03-31	3075
2012-06-30	3062
2012-09-30	3336
2012-12-31	2627
2013-03-31	2080
2013-06-30	2058
2013-09-30	1741
2013-12-31	2868
2014-03-31	3088
2014-06-30	2329
2014-09-30	2181
2014-12-31	2541
2015-03-31	2341
2015-06-30	2602
2015-09-30	2916
2015-12-31	2636
2016-03-31	2477
2016-06-30	2530
2016-09-30	2429
2016-12-31	2069
2017-03-31	1800
2017-06-30	3446
2017-09-30	3182
2017-12-31	3745
2018-03-31	3623
2018-06-30	3751
2018-09-30	3405
2018-12-31	3543
2019-03-31	2936
2019-06-30	2274
2019-09-30	2871
2019-12-31	2733
2020-03-31	2610
2020-06-30	2321
2020-09-30	2633
2020-12-31	2533
2021-03-31	2515
2021-06-30	2610
2021-09-30	2135
2021-12-31	1873
2022-03-31	1903
2022-06-30	1900
2022-09-30	1786
2022-12-31	1535
2023-03-31	2013
2023-06-30	2034
2023-09-30	1848