Quarter	Millions of US Dollars
2005-01-01	19830
2005-04-01	22265
2005-07-01	22751
2005-10-01	24991
2006-01-01	30215
2006-04-01	32259
2006-07-01	35352
2006-10-01	46277
2007-01-01	61804
2007-04-01	69109
2007-07-01	71736
2007-10-01	88563
2008-01-01	88767
2008-04-01	88744
2008-07-01	82755
2008-10-01	78731
2009-01-01	80897
2009-04-01	85654
2009-07-01	90209
2009-10-01	97464
2010-01-01	106854
2010-04-01	109887
2010-07-01	126553
2010-10-01	133196
2011-01-01	141117
2011-04-01	143784
2011-07-01	149390
2011-10-01	151346
2012-01-01	157663
2012-04-01	142677
2012-07-01	136952
2012-10-01	144568
2013-01-01	162993
2013-04-01	141389
2013-07-01	131171
2013-10-01	123799
2014-01-01	125659
2014-04-01	128351
2014-07-01	125430
2014-10-01	126607
2015-01-01	122852
2015-04-01	122535
2015-07-01	110111
2015-10-01	109329
2016-01-01	129816
2016-04-01	125335
2016-07-01	123434
2016-10-01	123738
2017-01-01	132837
2017-04-01	129722
2017-07-01	128433
2017-10-01	136068
2018-01-01	139893