Quarter	Millions of US Dollars
2009-10-01	1266770
2010-01-01	1175796
2010-04-01	1088748
2010-07-01	1161978
2010-10-01	1169040
2011-01-01	1220936
2011-04-01	1224531
2011-07-01	1131901
2011-10-01	1099275
2012-01-01	1122529
2012-04-01	1060683
2012-07-01	1070405
2012-10-01	1081782
2013-01-01	1012783
2013-04-01	1026283
2013-07-01	1021177
2013-10-01	1032241
2014-01-01	1014096
2014-04-01	1013473
2014-07-01	941154
2014-10-01	882763
2015-01-01	788997
2015-04-01	820096
2015-07-01	720579
2015-10-01	734336
2016-01-01	721125
2016-04-01	682235
2016-07-01	671155
2016-10-01	617723
2017-01-01	609442
2017-04-01	662284
2017-07-01	677848
2017-10-01	689086
2018-01-01	680248