Quarter	US dollars
2004-12-31	12873
2005-03-31	17121
2005-06-30	12474
2005-09-30	12191
2005-12-31	16757
2006-03-31	17761
2006-06-30	19800
2006-09-30	23428
2006-12-31	25742
2007-03-31	26028
2007-06-30	25084
2007-09-30	26189
2007-12-31	24854
2008-03-31	25462
2008-06-30	17905
2008-09-30	15825
2008-12-31	12474
2009-03-31	11617
2009-06-30	9968
2009-09-30	4723
2009-12-31	2453
2010-03-31	4165
2010-06-30	2398
2010-09-30	5892
2010-12-31	4931
2011-03-31	4617
2011-06-30	4711
2011-09-30	5858
2011-12-31	2751
2012-03-31	1413
2012-06-30	4028
2012-09-30	4097
2012-12-31	2508
2013-03-31	3101
2013-06-30	3012
2013-09-30	1948
2013-12-31	2317
2014-03-31	3510
2014-06-30	3626
2014-09-30	3559
2014-12-31	3471
2015-03-31	3078
2015-06-30	2806
2015-09-30	2042
2015-12-31	1749
2016-03-31	1735
2016-06-30	2678
2016-09-30	2431
2016-12-31	2783
2017-03-31	2708
2017-06-30	2660
2017-09-30	3950
2017-12-31	2422
2018-03-31	2786
2018-06-30	4063
2018-09-30	3229
2018-12-31	3568
2019-03-31	3148
2019-06-30	1130
2019-09-30	2322
2019-12-31	2222
2020-03-31	1955
2020-06-30	1510
2020-09-30	2202
2020-12-31	1810
2021-03-31	919
2021-06-30	430
2021-09-30	2054
2021-12-31	1515
2022-03-31	1816
2022-06-30	247
2022-09-30	1350
2022-12-31	141
2023-03-31	628
2023-06-30	1984
2023-09-30	2346