Quarter	Millions of US Dollars
2010-04-01	34557
2010-07-01	37279
2010-10-01	40996
2011-01-01	42143
2011-04-01	47415
2011-07-01	48336
2011-10-01	53718
2012-01-01	56874
2012-04-01	58146
2012-07-01	61445
2012-10-01	61117
2013-01-01	64539
2013-04-01	70394
2013-07-01	71383
2013-10-01	72110
2014-01-01	82684
2014-04-01	82470
2014-07-01	80564
2014-10-01	85164
2015-01-01	87276
2015-04-01	89325
2015-07-01	91139
2015-10-01	91904
2016-01-01	96485
2016-04-01	98207
2016-07-01	104942
2016-10-01	102503
2017-01-01	107228
2017-04-01	108015
2017-07-01	111989
2017-10-01	107092
2018-01-01	107669