Quarter	Millions of US Dollars
2005-10-01	216349
2006-01-01	219754
2006-04-01	225939
2006-07-01	235419
2006-10-01	256694
2007-01-01	256129
2007-04-01	272053
2007-07-01	269959
2007-10-01	285531
2008-01-01	299085
2008-04-01	325519
2008-07-01	308892
2008-10-01	259646
2009-01-01	261830
2009-04-01	353986
2009-07-01	353383
2009-10-01	363966
2010-01-01	399207
2010-04-01	395741
2010-07-01	411755
2010-10-01	428501
2011-01-01	464100
2011-04-01	494804
2011-07-01	438296
2011-10-01	447255
2012-01-01	510614
2012-04-01	499430
2012-07-01	539128
2012-10-01	540213
2013-01-01	589567
2013-04-01	576853
2013-07-01	577524
2013-10-01	606689
2014-01-01	627320
2014-04-01	644840
2014-07-01	634971
2014-10-01	598476
2015-01-01	590428
2015-04-01	588388
2015-07-01	551994
2015-10-01	540607
2016-01-01	543900
2016-04-01	495729
2016-07-01	485151
2016-10-01	462292
2017-01-01	521980
2017-04-01	556000
2017-07-01	568263
2017-10-01	521259
2018-01-01	576247