Quarter	US dollars
2004-12-31	1336
2005-03-31	1195
2005-06-30	1362
2005-09-30	1159
2005-12-31	1351
2006-03-31	1639
2006-06-30	1873
2006-09-30	5642
2006-12-31	6067
2007-03-31	2312
2007-06-30	2406
2007-09-30	2985
2007-12-31	3179
2008-03-31	3450
2008-06-30	3089
2008-09-30	2873
2008-12-31	2766
2009-03-31	2886
2009-06-30	2837
2009-09-30	2778
2009-12-31	2734
2010-03-31	2651
2010-06-30	2376
2010-09-30	2579
2010-12-31	2618
2011-03-31	2472
2011-06-30	2458
2011-09-30	2019
2011-12-31	2177
2012-03-31	2632
2012-06-30	2329
2012-09-30	2405
2012-12-31	2440
2013-03-31	2502
2013-06-30	2384
2013-09-30	2455
2013-12-31	2752
2014-03-31	2709
2014-06-30	2592
2014-09-30	1417
2014-12-31	1712
2015-03-31	1364
2015-06-30	1485
2015-09-30	1292
2015-12-31	1300
2016-03-31	1228
2016-06-30	1006
2016-09-30	994
2016-12-31	1016
2017-03-31	963
2017-06-30	1035
2017-09-30	1038
2017-12-31	898
2018-03-31	970
2018-06-30	912
2018-09-30	883
2018-12-31	900
2019-03-31	848
2019-06-30	841
2019-09-30	779
2019-12-31	897
2020-03-31	871
2020-06-30	784
2020-09-30	810
2020-12-31	834
2021-03-31	842
2021-06-30	790
2021-09-30	756
2021-12-31	761
2022-03-31	720
2022-06-30	671
2022-09-30	650
2022-12-31	635
2023-03-31	655
2023-06-30	681
2023-09-30	609