Quarter	US dollars
2004-12-31	5721
2005-03-31	5414
2005-06-30	4677
2005-09-30	4585
2005-12-31	4570
2006-03-31	6716
2006-06-30	5799
2006-09-30	5821
2006-12-31	9495
2007-03-31	6855
2007-06-30	6768
2007-09-30	7170
2007-12-31	4985
2008-03-31	4782
2008-06-30	5497
2008-09-30	4607
2008-12-31	3437
2009-03-31	3280
2009-06-30	3305
2009-09-30	2629
2009-12-31	2652
2010-03-31	1861
2010-06-30	1592
2010-09-30	1635
2010-12-31	2973
2011-03-31	2707
2011-06-30	2691
2011-09-30	2056
2011-12-31	1184
2012-03-31	1135
2012-06-30	1696
2012-09-30	1295
2012-12-31	1386
2013-03-31	1219
2013-06-30	1127
2013-09-30	1380
2013-12-31	2028
2014-03-31	1067
2014-06-30	1337
2014-09-30	1096
2014-12-31	1011
2015-03-31	898
2015-06-30	851
2015-09-30	815
2015-12-31	891
2016-03-31	1111
2016-06-30	944
2016-09-30	2179
2016-12-31	2841
2017-03-31	2489
2017-06-30	1530
2017-09-30	1389
2017-12-31	1889
2018-03-31	3383
2018-06-30	2639
2018-09-30	2557
2018-12-31	2145
2019-03-31	1762
2019-06-30	1399
2019-09-30	1488
2019-12-31	2510
2020-03-31	2833
2020-06-30	2781
2020-09-30	2014
2020-12-31	2004
2021-03-31	1802
2021-06-30	1853
2021-09-30	1952
2021-12-31	2106
2022-03-31	2423
2022-06-30	1834
2022-09-30	1695
2022-12-31	1782
2023-03-31	2624
2023-06-30	2868
2023-09-30	2560