Quarter	Millions of US Dollars
2001-10-01	85653
2002-01-01	88169
2002-04-01	96972
2002-07-01	102532
2002-10-01	108481
2003-01-01	117095
2003-04-01	122783
2003-07-01	130430
2003-10-01	145220
2004-01-01	140544
2004-04-01	139510
2004-07-01	146978
2004-10-01	163380
2005-01-01	153492
2005-04-01	133569
2005-07-01	135280
2005-10-01	140387
2006-01-01	137319
2006-04-01	146478
2006-07-01	142469
2006-10-01	157550
2007-01-01	149089
2007-04-01	146418
2007-07-01	142346
2007-10-01	148525
2008-01-01	154927
2008-04-01	141364
2008-07-01	134868
2008-10-01	115344
2009-01-01	103697
2009-04-01	111153
2009-07-01	120730
2009-10-01	121265
2010-01-01	123545
2010-04-01	115107
2010-07-01	128938
2010-10-01	134723
2011-01-01	138095
2011-04-01	139870
2011-07-01	125114
2011-10-01	128089
2012-01-01	132925
2012-04-01	128892
2012-07-01	137206
2012-10-01	135453
2013-01-01	141125
2013-04-01	139095
2013-07-01	143975
2013-10-01	148270
2014-01-01	149845
2014-04-01	141487
2014-07-01	131254
2014-10-01	124465
2015-01-01	116009
2015-04-01	128972
2015-07-01	118943
2015-10-01	120285
2016-01-01	124227
2016-04-01	124061
2016-07-01	114007
2016-10-01	110032
2017-01-01	112590
2017-04-01	119410
2017-07-01	116223
2017-10-01	118794
2018-01-01	112184