Quarter	US dollars
2004-12-31	7789
2005-03-31	9446
2005-06-30	7701
2005-09-30	9958
2005-12-31	7345
2006-03-31	9198
2006-06-30	7605
2006-09-30	8332
2006-12-31	10362
2007-03-31	9824
2007-06-30	10487
2007-09-30	10607
2007-12-31	9674
2008-03-31	8552
2008-06-30	8944
2008-09-30	6284
2008-12-31	5145
2009-03-31	5598
2009-06-30	4664
2009-09-30	4999
2009-12-31	4807
2010-03-31	5031
2010-06-30	5317
2010-09-30	5733
2010-12-31	4020
2011-03-31	4652
2011-06-30	3495
2011-09-30	4371
2011-12-31	3905
2012-03-31	3799
2012-06-30	4080
2012-09-30	3995
2012-12-31	3051
2013-03-31	2613
2013-06-30	2959
2013-09-30	2886
2013-12-31	2347
2014-03-31	2296
2014-06-30	2879
2014-09-30	2265
2014-12-31	2641
2015-03-31	2373
2015-06-30	2070
2015-09-30	1996
2015-12-31	2198
2016-03-31	2173
2016-06-30	2239
2016-09-30	2318
2016-12-31	1585
2017-03-31	3620
2017-06-30	2825
2017-09-30	2367
2017-12-31	2214
2018-03-31	4461
2018-06-30	3595
2018-09-30	2173
2018-12-31	1751
2019-03-31	1750
2019-06-30	2771
2019-09-30	2367
2019-12-31	2250
2020-03-31	2677
2020-06-30	2817
2020-09-30	2951
2020-12-31	2666
2021-03-31	2820
2021-06-30	2989
2021-09-30	2803
2021-12-31	1737
2022-03-31	1878
2022-06-30	2775
2022-09-30	3046
2022-12-31	2974
2023-03-31	2903
2023-06-30	2939
2023-09-30	3101