Quarter	Millions of US Dollars
2005-01-01	47281
2005-04-01	49185
2005-07-01	50376
2005-10-01	52973
2006-01-01	55198
2006-04-01	55557
2006-07-01	54954
2006-10-01	57253
2007-01-01	57922
2007-04-01	60745
2007-07-01	61233
2007-10-01	68281
2008-01-01	69745
2008-04-01	70035
2008-07-01	67130
2008-10-01	66479
2009-01-01	63240
2009-04-01	67472
2009-07-01	69941
2009-10-01	73208
2010-01-01	74828
2010-04-01	76409
2010-07-01	81539
2010-10-01	84136
2011-01-01	85589
2011-04-01	90294
2011-07-01	85553
2011-10-01	86064
2012-01-01	97769
2012-04-01	96944
2012-07-01	103864
2012-10-01	108286
2013-01-01	110314
2013-04-01	109547
2013-07-01	106625
2013-10-01	109318
2014-01-01	112937
2014-04-01	115053
2014-07-01	113000
2014-10-01	108621
2015-01-01	103193
2015-04-01	103230
2015-07-01	89635
2015-10-01	97172
2016-01-01	109803
2016-04-01	108430
2016-07-01	109292
2016-10-01	100175
2017-01-01	104420
2017-04-01	110958
2017-07-01	116921
2017-10-01	126154
2018-01-01	137121