Quarter	Millions of US Dollars
2004-01-01	6224
2004-04-01	7051
2004-07-01	8119
2004-10-01	9486
2005-01-01	11508
2005-04-01	14038
2005-07-01	17015
2005-10-01	20011
2006-01-01	23897
2006-04-01	27498
2006-07-01	32860
2006-10-01	40345
2007-01-01	47052
2007-04-01	55181
2007-07-01	55124
2007-10-01	64594
2008-01-01	68074
2008-04-01	78165
2008-07-01	74786
2008-10-01	69169
2009-01-01	63904
2009-04-01	68109
2009-07-01	69555
2009-10-01	68257
2010-01-01	68656
2010-04-01	64087
2010-07-01	73075
2010-10-01	79336
2011-01-01	84874
2011-04-01	88623
2011-07-01	81620
2011-10-01	84183
2012-01-01	95382
2012-04-01	95405
2012-07-01	115848
2012-10-01	129838
2013-01-01	140808
2013-04-01	139827
2013-07-01	147155
2013-10-01	157099
2014-01-01	159312
2014-04-01	171522
2014-07-01	159472
2014-10-01	129049
2015-01-01	131123
2015-04-01	134425
2015-07-01	121947
2015-10-01	109727
2016-01-01	115920
2016-04-01	120673
2016-07-01	120765
2016-10-01	121345
2017-01-01	127121
2017-04-01	126537
2017-07-01	129373
2017-10-01	127643
2018-01-01	127735