Quarter	US dollars
2004-12-31	2072
2005-03-31	3089
2005-06-30	1914
2005-09-30	1947
2005-12-31	2180
2006-03-31	4655
2006-06-30	4398
2006-09-30	3996
2006-12-31	4280
2007-03-31	8063
2007-06-30	5949
2007-09-30	7655
2007-12-31	4712
2008-03-31	2139
2008-06-30	6030
2008-09-30	4637
2008-12-31	2303
2009-03-31	2428
2009-06-30	4534
2009-09-30	5211
2009-12-31	3580
2010-03-31	3085
2010-06-30	3039
2010-09-30	7876
2010-12-31	8986
2011-03-31	13148
2011-06-30	16348
2011-09-30	5007
2011-12-31	3244
2012-03-31	5473
2012-06-30	3136
2012-09-30	3535
2012-12-31	3032
2013-03-31	2786
2013-06-30	5516
2013-09-30	5321
2013-12-31	6289
2014-03-31	6959
2014-06-30	7795
2014-09-30	6044
2014-12-31	5583
2015-03-31	5688
2015-06-30	5024
2015-09-30	4968
2015-12-31	4818
2016-03-31	4443
2016-06-30	3022
2016-09-30	3024
2016-12-31	3522
2017-03-31	3976
2017-06-30	2803
2017-09-30	2756
2017-12-31	2707
2018-03-31	3054
2018-06-30	1220
2018-09-30	1496
2018-12-31	2024
2019-03-31	4
2019-06-30	1373
2019-09-30	1225
2019-12-31	1012
2020-03-31	-2286
2020-06-30	-58
2020-09-30	1193
2020-12-31	450
2021-03-31	-3152
2021-06-30	1195
2021-09-30	262
2021-12-31	2987
2022-03-31	-4039
2022-06-30	376
2022-09-30	-222
2022-12-31	-353
2023-03-31	-2190
2023-06-30	2243
2023-09-30	3018