Quarter	Millions of US Dollars
1999-10-01	148859
2000-01-01	139602
2000-04-01	143292
2000-07-01	133729
2000-10-01	142333
2001-01-01	135150
2001-04-01	129515
2001-07-01	142651
2001-10-01	138165
2002-01-01	136324
2002-04-01	156193
2002-07-01	156418
2002-10-01	173833
2003-01-01	175188
2003-04-01	178898
2003-07-01	186831
2003-10-01	198755
2004-01-01	195970
2004-04-01	201036
2004-07-01	204089
2004-10-01	224332
2005-01-01	214738
2005-04-01	199724
2005-07-01	195826
2005-10-01	193659
2006-01-01	200541
2006-04-01	209469
2006-07-01	203951
2006-10-01	207062
2007-01-01	205060
2007-04-01	198238
2007-07-01	210453
2007-10-01	220298
2008-01-01	243466
2008-04-01	237048
2008-07-01	220055
2008-10-01	231633
2009-01-01	208600
2009-04-01	221793
2009-07-01	238047
2009-10-01	234657
2010-01-01	231952
2010-04-01	235207
2010-07-01	253481
2010-10-01	272204
2011-01-01	282930
2011-04-01	308380
2011-07-01	291703
2011-10-01	287477
2012-01-01	312277
2012-04-01	294344
2012-07-01	304319
2012-10-01	319007
2013-01-01	308711
2013-04-01	315017
2013-07-01	333239
2013-10-01	341440
2014-01-01	348559
2014-04-01	351974
2014-07-01	338090
2014-10-01	329726
2015-01-01	345833
2015-04-01	360956
2015-07-01	345989
2015-10-01	345216
2016-01-01	356927
2016-04-01	349992
2016-07-01	356273
2016-10-01	342966
2017-01-01	352851
2017-04-01	369844
2017-07-01	366051
2017-10-01	369057
2018-01-01	377467