Quarter	Millions of US Dollars
2009-04-01	1649
2009-07-01	1497
2009-10-01	2693
2010-01-01	1504
2010-04-01	1601
2010-07-01	1536
2010-10-01	967
2011-01-01	1148
2011-04-01	1721
2011-07-01	1579
2011-10-01	1515
2012-01-01	1958
2012-04-01	1696
2012-07-01	1829
2012-10-01	1390
2013-01-01	1574
2013-04-01	1539
2013-07-01	1231
2013-10-01	787
2014-01-01	849
2014-04-01	719
2014-07-01	627
2014-10-01	547
2015-01-01	617
2015-04-01	1006
2015-07-01	680
2015-10-01	328
2016-01-01	353
2016-04-01	437
2016-07-01	452
2016-10-01	298
2017-01-01	339
2017-04-01	546
2017-07-01	560
2017-10-01	470
2018-01-01	624