Quarter	Millions of US Dollars
2002-04-01	76497
2002-07-01	77607
2002-10-01	83457
2003-01-01	80390
2003-04-01	90719
2003-07-01	105674
2003-10-01	114880
2004-01-01	134597
2004-04-01	138854
2004-07-01	149575
2004-10-01	174000
2005-01-01	193583
2005-04-01	204658
2005-07-01	205752
2005-10-01	223220
2006-01-01	244848
2006-04-01	271455
2006-07-01	275981
2006-10-01	285767
2007-01-01	290708
2007-04-01	305142
2007-07-01	307578
2007-10-01	302204
2008-01-01	293303
2008-04-01	285749
2008-07-01	238400
2008-10-01	223391
2009-01-01	225173
2009-04-01	251384
2009-07-01	291640
2009-10-01	296193
2010-01-01	325830
2010-04-01	303061
2010-07-01	338490
2010-10-01	337271
2011-01-01	364184
2011-04-01	382849
2011-07-01	347776
2011-10-01	356836
2012-01-01	380834
2012-04-01	384887
2012-07-01	398023
2012-10-01	413371
2013-01-01	415448
2013-04-01	419062
2013-07-01	447948
2013-10-01	460802
2014-01-01	477926
2014-04-01	523096
2014-07-01	498601
2014-10-01	484582
2015-01-01	504983
2015-04-01	514236
2015-07-01	492917
2015-10-01	499336
2016-01-01	539086
2016-04-01	546174
2016-07-01	570980
2016-10-01	519528
2017-01-01	582738
2017-04-01	581358
2017-07-01	580646
2017-10-01	622645
2018-01-01	647856