Quarter	Millions of US Dollars
2001-10-01	4179
2002-01-01	4260
2002-04-01	4603
2002-07-01	4525
2002-10-01	4686
2003-01-01	82582
2003-04-01	88664
2003-07-01	96625
2003-10-01	107133
2004-01-01	96276
2004-04-01	101139
2004-07-01	106748
2004-10-01	122308
2005-01-01	114656
2005-04-01	100386
2005-07-01	102427
2005-10-01	102597
2006-01-01	106794
2006-04-01	113113
2006-07-01	108653
2006-10-01	118233
2007-01-01	117046
2007-04-01	117842
2007-07-01	119174
2007-10-01	119678
2008-01-01	126874
2008-04-01	124766
2008-07-01	111430
2008-10-01	96453
2009-01-01	90663
2009-04-01	99625
2009-07-01	110651
2009-10-01	104107
2010-01-01	104704
2010-04-01	100237
2010-07-01	117446
2010-10-01	119572
2011-01-01	121108
2011-04-01	123207
2011-07-01	115123
2011-10-01	115560
2012-01-01	118344
2012-04-01	114729
2012-07-01	123887
2012-10-01	117040
2013-01-01	119948
2013-04-01	120540
2013-07-01	126960
2013-10-01	130379
2014-01-01	132572
2014-04-01	119933
2014-07-01	113497
2014-10-01	109661
2015-01-01	101072
2015-04-01	109585
2015-07-01	101196
2015-10-01	100202
2016-01-01	107147
2016-04-01	105231
2016-07-01	99655
2016-10-01	97805
2017-01-01	101885
2017-04-01	106884
2017-07-01	103574
2017-10-01	104608
2018-01-01	103788