Quarter	Millions of US Dollars
2009-10-01	2877
2010-01-01	2967
2010-04-01	4340
2010-07-01	4921
2010-10-01	4897
2011-01-01	5043
2011-04-01	3929
2011-07-01	4038
2011-10-01	3938
2012-01-01	4023
2012-04-01	3557
2012-07-01	3369
2012-10-01	8167
2013-01-01	7664
2013-04-01	7261
2013-07-01	7569
2013-10-01	9529
2014-01-01	10441
2014-04-01	10689
2014-07-01	10993
2014-10-01	10311
2015-01-01	11546
2015-04-01	11382
2015-07-01	13239
2015-10-01	11723
2016-01-01	11753
2016-04-01	12205
2016-07-01	12672
2016-10-01	17317
2017-01-01	18762
2017-04-01	15108
2017-07-01	15534
2017-10-01	17542
2018-01-01	14529