Quarter	Millions of US Dollars
2008-01-01	81442
2008-04-01	71159
2008-07-01	73163
2008-10-01	63970
2009-01-01	73935
2009-04-01	82427
2009-07-01	85107
2009-10-01	91135
2010-01-01	91005
2010-04-01	88368
2010-07-01	103818
2010-10-01	105610
2011-01-01	110920
2011-04-01	121034
2011-07-01	118268
2011-10-01	116521
2012-01-01	131663
2012-04-01	129021
2012-07-01	143897
2012-10-01	134373
2013-01-01	140636
2013-04-01	135311
2013-07-01	139832
2013-10-01	133530
2014-01-01	129308
2014-04-01	139989
2014-07-01	131322
2014-10-01	131634
2015-01-01	131069
2015-04-01	130771
2015-07-01	120729
2015-10-01	117066
2016-01-01	127600
2016-04-01	139570
2016-07-01	151971