Quarter	Millions of US Dollars
2005-01-01	52694
2005-04-01	55798
2005-07-01	56526
2005-10-01	59271
2006-01-01	63112
2006-04-01	63596
2006-07-01	63033
2006-10-01	64675
2007-01-01	65502
2007-04-01	68558
2007-07-01	69334
2007-10-01	76343
2008-01-01	90463
2008-04-01	90597
2008-07-01	87659
2008-10-01	87078
2009-01-01	82120
2009-04-01	85149
2009-07-01	94945
2009-10-01	96824
2010-01-01	98522
2010-04-01	102279
2010-07-01	109885
2010-10-01	115501
2011-01-01	112317
2011-04-01	117311
2011-07-01	114096
2011-10-01	114996
2012-01-01	133049
2012-04-01	133021
2012-07-01	145816
2012-10-01	150066
2013-01-01	151512
2013-04-01	147474
2013-07-01	143822
2013-10-01	147325
2014-01-01	151599
2014-04-01	152759
2014-07-01	146900
2014-10-01	134743
2015-01-01	131661
2015-04-01	131603
2015-07-01	115705
2015-10-01	123358
2016-01-01	136527
2016-04-01	134663
2016-07-01	135534
2016-10-01	126666
2017-01-01	132634
2017-04-01	139933
2017-07-01	145914
2017-10-01	155264
2018-01-01	165388