Quarter	Millions of US Dollars
2005-01-01	123605
2005-04-01	136510
2005-07-01	140217
2005-10-01	142572
2006-01-01	154301
2006-04-01	158668
2006-07-01	162281
2006-10-01	170996
2007-01-01	181919
2007-04-01	190920
2007-07-01	192054
2007-10-01	202255
2008-01-01	229793
2008-04-01	235109
2008-07-01	222110
2008-10-01	217159
2009-01-01	205002
2009-04-01	217613
2009-07-01	228774
2009-10-01	231251
2010-01-01	242295
2010-04-01	260885
2010-07-01	281275
2010-10-01	293341
2011-01-01	305948
2011-04-01	317537
2011-07-01	312332
2011-10-01	312298
2012-01-01	349979
2012-04-01	344432
2012-07-01	371778
2012-10-01	379604
2013-01-01	375905
2013-04-01	368241
2013-07-01	360235
2013-10-01	367730
2014-01-01	378691
2014-04-01	385585
2014-07-01	386717
2014-10-01	373248
2015-01-01	350749
2015-04-01	344340
2015-07-01	296573
2015-10-01	312629
2016-01-01	348536
2016-04-01	344203
2016-07-01	332324
2016-10-01	310255
2017-01-01	323843
2017-04-01	340508
2017-07-01	349104
2017-10-01	369656
2018-01-01	394279