Quarter	Millions of US Dollars
1999-10-01	49369
2000-01-01	46300
2000-04-01	45735
2000-07-01	42681
2000-10-01	45083
2001-01-01	45008
2001-04-01	43904
2001-07-01	50434
2001-10-01	48360
2002-01-01	49346
2002-04-01	58055
2002-07-01	56835
2002-10-01	70331
2003-01-01	72867
2003-04-01	75293
2003-07-01	80705
2003-10-01	88585
2004-01-01	90025
2004-04-01	94206
2004-07-01	97095
2004-10-01	106064
2005-01-01	102093
2005-04-01	95434
2005-07-01	94877
2005-10-01	93945
2006-01-01	98359
2006-04-01	100302
2006-07-01	98319
2006-10-01	101318
2007-01-01	101747
2007-04-01	98154
2007-07-01	103662
2007-10-01	108883
2008-01-01	118649
2008-04-01	115773
2008-07-01	106333
2008-10-01	111246
2009-01-01	96820
2009-04-01	102936
2009-07-01	107878
2009-10-01	106965
2010-01-01	104126
2010-04-01	105118
2010-07-01	107424
2010-10-01	114096
2011-01-01	117891
2011-04-01	123190
2011-07-01	114888
2011-10-01	111798
2012-01-01	118713
2012-04-01	106654
2012-07-01	111450
2012-10-01	117363
2013-01-01	108629
2013-04-01	111728
2013-07-01	120877
2013-10-01	120847
2014-01-01	124268
2014-04-01	125338
2014-07-01	121091
2014-10-01	116712
2015-01-01	120879
2015-04-01	123605
2015-07-01	118727
2015-10-01	118499
2016-01-01	116088
2016-04-01	116458
2016-07-01	118352
2016-10-01	111611
2017-01-01	113907
2017-04-01	114345
2017-07-01	114004
2017-10-01	115300
2018-01-01	111752