Quarter	Millions of US Dollars
2010-04-01	28066
2010-07-01	30978
2010-10-01	33359
2011-01-01	33453
2011-04-01	37620
2011-07-01	38186
2011-10-01	40762
2012-01-01	43289
2012-04-01	43778
2012-07-01	45712
2012-10-01	45291
2013-01-01	48501
2013-04-01	52413
2013-07-01	54772
2013-10-01	55542
2014-01-01	55308
2014-04-01	46545
2014-07-01	43704
2014-10-01	43982
2015-01-01	44800
2015-04-01	45284
2015-07-01	47714
2015-10-01	47966
2016-01-01	47389
2016-04-01	47744
2016-07-01	61907
2016-10-01	59515
2017-01-01	62960
2017-04-01	62457
2017-07-01	71794
2017-10-01	68721
2018-01-01	75543