Quarter	Millions of US Dollars
1999-10-01	60296
2000-01-01	58167
2000-04-01	60969
2000-07-01	57035
2000-10-01	61887
2001-01-01	57741
2001-04-01	56194
2001-07-01	61021
2001-10-01	59226
2002-01-01	57759
2002-04-01	65178
2002-07-01	66097
2002-10-01	69724
2003-01-01	69894
2003-04-01	70194
2003-07-01	72251
2003-10-01	75775
2004-01-01	72230
2004-04-01	73516
2004-07-01	72486
2004-10-01	79823
2005-01-01	75848
2005-04-01	71282
2005-07-01	67688
2005-10-01	67257
2006-01-01	69289
2006-04-01	75069
2006-07-01	72686
2006-10-01	73523
2007-01-01	71986
2007-04-01	69959
2007-07-01	74978
2007-10-01	78718
2008-01-01	87444
2008-04-01	85843
2008-07-01	80585
2008-10-01	84652
2009-01-01	76895
2009-04-01	80942
2009-07-01	86123
2009-10-01	86700
2010-01-01	84472
2010-04-01	84662
2010-07-01	96169
2010-10-01	104883
2011-01-01	110357
2011-04-01	123110
2011-07-01	117638
2011-10-01	117037
2012-01-01	124938
2012-04-01	123296
2012-07-01	128415
2012-10-01	134040
2013-01-01	132070
2013-04-01	134532
2013-07-01	141804
2013-10-01	148134
2014-01-01	151964
2014-04-01	154524
2014-07-01	149451
2014-10-01	147245
2015-01-01	153741
2015-04-01	164820
2015-07-01	160122
2015-10-01	159366
2016-01-01	167379
2016-04-01	165460
2016-07-01	169412
2016-10-01	165551
2017-01-01	169663
2017-04-01	181969
2017-07-01	179230
2017-10-01	180027
2018-01-01	188415