Quarter	Millions of US Dollars
2004-10-01	167653
2005-01-01	172657
2005-04-01	176470
2005-07-01	181582
2005-10-01	182310
2006-01-01	183642
2006-04-01	158562
2006-07-01	167044
2006-10-01	178316
2007-01-01	190967
2007-04-01	193832
2007-07-01	214156
2007-10-01	218887
2008-01-01	203791
2008-04-01	212922
2008-07-01	210066
2008-10-01	177997
2009-01-01	175128
2009-04-01	197277
2009-07-01	216014
2009-10-01	220636
2010-01-01	223865
2010-04-01	217041
2010-07-01	239636
2010-10-01	227831
2011-01-01	232975
2011-04-01	223080
2011-07-01	197275
2011-10-01	195307
2012-01-01	210779
2012-04-01	208257
2012-07-01	216035
2012-10-01	216550
2013-01-01	216701
2013-04-01	205368
2013-07-01	200268
2013-10-01	187733
2014-01-01	189923
2014-04-01	192559
2014-07-01	178485
2014-10-01	177762
2015-01-01	161854
2015-04-01	160716
2015-07-01	144794
2015-10-01	150846
2016-01-01	158886
2016-04-01	156960
2016-07-01	153934
2016-10-01	133255
2017-01-01	132861
2017-04-01	140846
2017-07-01	147111
2017-10-01	141246
2018-01-01	138934