Quarter	Millions of US Dollars
2005-01-01	114008
2005-04-01	126575
2005-07-01	131042
2005-10-01	133058
2006-01-01	143575
2006-04-01	148183
2006-07-01	151570
2006-10-01	160559
2007-01-01	171578
2007-04-01	180662
2007-07-01	182384
2007-10-01	192611
2008-01-01	207731
2008-04-01	213077
2008-07-01	199692
2008-10-01	194699
2009-01-01	183337
2009-04-01	198270
2009-07-01	205243
2009-10-01	209007
2010-01-01	219656
2010-04-01	237208
2010-07-01	256977
2010-10-01	269395
2011-01-01	283480
2011-04-01	293613
2011-07-01	288528
2011-10-01	288328
2012-01-01	325746
2012-04-01	319581
2012-07-01	344049
2012-10-01	351896
2013-01-01	347482
2013-04-01	339452
2013-07-01	328747
2013-10-01	335446
2014-01-01	345825
2014-04-01	351445
2014-07-01	354841
2014-10-01	340346
2015-01-01	314216
2015-04-01	306867
2015-07-01	260128
2015-10-01	276672
2016-01-01	311691
2016-04-01	306310
2016-07-01	296822
2016-10-01	274373
2017-01-01	285085
2017-04-01	302488
2017-07-01	311839
2017-10-01	331968
2018-01-01	357566