Quarter	Millions of US Dollars
2005-01-01	47802
2005-04-01	50938
2005-07-01	52218
2005-10-01	54988
2006-01-01	57823
2006-04-01	58445
2006-07-01	57865
2006-10-01	60326
2007-01-01	61247
2007-04-01	64624
2007-07-01	65254
2007-10-01	72336
2008-01-01	74105
2008-04-01	74263
2008-07-01	71248
2008-10-01	70672
2009-01-01	66212
2009-04-01	69974
2009-07-01	75140
2009-10-01	78263
2010-01-01	79559
2010-04-01	83554
2010-07-01	90314
2010-10-01	96215
2011-01-01	94790
2011-04-01	99171
2011-07-01	96236
2011-10-01	97180
2012-01-01	115019
2012-04-01	114587
2012-07-01	125473
2012-10-01	129755
2013-01-01	130584
2013-04-01	126414
2013-07-01	120104
2013-10-01	122962
2014-01-01	126936
2014-04-01	127431
2014-07-01	124097
2014-10-01	111530
2015-01-01	104848
2015-04-01	104878
2015-07-01	90676
2015-10-01	98521
2016-01-01	111180
2016-04-01	109617
2016-07-01	110553
2016-10-01	101352
2017-01-01	105622
2017-04-01	112549
2017-07-01	118576
2017-10-01	128743
2018-01-01	140266