Quarter	US dollars
2004-12-31	1931
2005-03-31	3289
2005-06-30	2307
2005-09-30	2505
2005-12-31	2242
2006-03-31	2749
2006-06-30	2811
2006-09-30	2406
2006-12-31	1611
2007-03-31	4709
2007-06-30	2618
2007-09-30	2559
2007-12-31	1224
2008-03-31	1069
2008-06-30	1813
2008-09-30	1850
2008-12-31	1642
2009-03-31	878
2009-06-30	1359
2009-09-30	270
2009-12-31	-413
2010-03-31	1051
2010-06-30	2054
2010-09-30	2659
2010-12-31	997
2011-03-31	1196
2011-06-30	1708
2011-09-30	3066
2011-12-31	1851
2012-03-31	2757
2012-06-30	3925
2012-09-30	3335
2012-12-31	3167
2013-03-31	3672
2013-06-30	3153
2013-09-30	4010
2013-12-31	3458
2014-03-31	3646
2014-06-30	4139
2014-09-30	2884
2014-12-31	2797
2015-03-31	2321
2015-06-30	2960
2015-09-30	2034
2015-12-31	2704
2016-03-31	2512
2016-06-30	2280
2016-09-30	2119
2016-12-31	1389
2017-03-31	653
2017-06-30	1013
2017-09-30	3066
2017-12-31	1310
2018-03-31	1781
2018-06-30	841
2018-09-30	844
2018-12-31	1214
2019-03-31	1197
2019-06-30	2098
2019-09-30	2161
2019-12-31	1544
2020-03-31	1945
2020-06-30	1717
2020-09-30	1123
2020-12-31	1725
2021-03-31	3147
2021-06-30	2914
2021-09-30	3331
2021-12-31	2757
2022-03-31	3738
2022-06-30	3630
2022-09-30	2652
2022-12-31	1825
2023-03-31	2959
2023-06-30	1869
2023-09-30	2463