Quarter	Millions of US Dollars
2004-10-01	167653
2005-01-01	172657
2005-04-01	176470
2005-07-01	181582
2005-10-01	182320
2006-01-01	183652
2006-04-01	158570
2006-07-01	167118
2006-10-01	178410
2007-01-01	191063
2007-04-01	193924
2007-07-01	214800
2007-10-01	220056
2008-01-01	204143
2008-04-01	213314
2008-07-01	210484
2008-10-01	178360
2009-01-01	175389
2009-04-01	197545
2009-07-01	216326
2009-10-01	220980
2010-01-01	224347
2010-04-01	217638
2010-07-01	240574
2010-10-01	229692
2011-01-01	236781
2011-04-01	229693
2011-07-01	204152
2011-10-01	202713
2012-01-01	221320
2012-04-01	221760
2012-07-01	230415
2012-10-01	232178
2013-01-01	233635
2013-04-01	221738
2013-07-01	216398
2013-10-01	204608
2014-01-01	207014
2014-04-01	210861
2014-07-01	197420
2014-10-01	197101
2015-01-01	178863
2015-04-01	177294
2015-07-01	160036
2015-10-01	167192
2016-01-01	176782
2016-04-01	174121
2016-07-01	170403
2016-10-01	147463
2017-01-01	147554
2017-04-01	156113
2017-07-01	165471
2017-10-01	160819
2018-01-01	160144