Quarter	Millions of US Dollars
2005-01-01	42683
2005-04-01	45094
2005-07-01	46945
2005-10-01	46992
2006-01-01	49468
2006-04-01	51801
2006-07-01	52649
2006-10-01	55316
2007-01-01	58993
2007-04-01	62058
2007-07-01	66488
2007-10-01	66772
2008-01-01	72273
2008-04-01	73925
2008-07-01	70705
2008-10-01	74526
2009-01-01	72723
2009-04-01	80945
2009-07-01	87690
2009-10-01	90442
2010-01-01	99678
2010-04-01	101360
2010-07-01	109167
2010-10-01	112115
2011-01-01	122648
2011-04-01	124474
2011-07-01	117916
2011-10-01	123442
2012-01-01	132914
2012-04-01	131238
2012-07-01	139318
2012-10-01	145127
2013-01-01	145905
2013-04-01	146887
2013-07-01	145667
2013-10-01	149556
2014-01-01	157693
2014-04-01	162852
2014-07-01	159753
2014-10-01	154324
2015-01-01	149238
2015-04-01	154643
2015-07-01	130398
2015-10-01	136059
2016-01-01	156360
2016-04-01	157889
2016-07-01	150532
2016-10-01	139639
2017-01-01	144768
2017-04-01	154305
2017-07-01	158643
2017-10-01	166042
2018-01-01	176707