Quarter	US dollars
2004-12-31	1403
2005-03-31	1686
2005-06-30	1701
2005-09-30	1710
2005-12-31	1746
2006-03-31	1816
2006-06-30	1796
2006-09-30	1706
2006-12-31	1904
2007-03-31	2120
2007-06-30	2171
2007-09-30	2614
2007-12-31	2676
2008-03-31	4651
2008-06-30	3218
2008-09-30	3331
2008-12-31	3035
2009-03-31	3487
2009-06-30	3170
2009-09-30	3112
2009-12-31	3091
2010-03-31	3296
2010-06-30	3278
2010-09-30	3499
2010-12-31	3544
2011-03-31	3422
2011-06-30	3534
2011-09-30	3621
2011-12-31	3782
2012-03-31	3936
2012-06-30	6770
2012-09-30	7558
2012-12-31	6698
2013-03-31	7589
2013-06-30	7486
2013-09-30	6886
2013-12-31	6735
2014-03-31	6806
2014-06-30	6871
2014-09-30	6341
2014-12-31	6471
2015-03-31	7063
2015-06-30	7322
2015-09-30	6533
2015-12-31	5865
2016-03-31	5881
2016-06-30	6164
2016-09-30	6225
2016-12-31	6225
2017-03-31	6030
2017-06-30	6725
2017-09-30	6696
2017-12-31	7051
2018-03-31	6718
2018-06-30	6632
2018-09-30	6245
2018-12-31	6553
2019-03-31	6278
2019-06-30	6809
2019-09-30	7014
2019-12-31	7075
2020-03-31	6631
2020-06-30	6680
2020-09-30	6967
2020-12-31	6799
2021-03-31	7066
2021-06-30	6947
2021-09-30	7122
2021-12-31	7152
2022-03-31	7021
2022-06-30	6758
2022-09-30	6752
2022-12-31	5624
2023-03-31	6416
2023-06-30	6109
2023-09-30	1745