Quarter	Millions of US Dollars
1999-10-01	93221
2000-01-01	88715
2000-04-01	87808
2000-07-01	81461
2000-10-01	83510
2001-01-01	78617
2001-04-01	75942
2001-07-01	85536
2001-10-01	78306
2002-01-01	76356
2002-04-01	90471
2002-07-01	95178
2002-10-01	107035
2003-01-01	116074
2003-04-01	122482
2003-07-01	123083
2003-10-01	123989
2004-01-01	127749
2004-04-01	126555
2004-07-01	132070
2004-10-01	147742
2005-01-01	130329
2005-04-01	124202
2005-07-01	114313
2005-10-01	107336
2006-01-01	101973
2006-04-01	101650
2006-07-01	103322
2006-10-01	105532
2007-01-01	99878
2007-04-01	93674
2007-07-01	97562
2007-10-01	103117
2008-01-01	106649
2008-04-01	98625
2008-07-01	91734
2008-10-01	120401
2009-01-01	109913
2009-04-01	122656
2009-07-01	134187
2009-10-01	128799
2010-01-01	130556
2010-04-01	130531
2010-07-01	148235
2010-10-01	137650
2011-01-01	150071
2011-04-01	159719
2011-07-01	168768
2011-10-01	156992
2012-01-01	155224
2012-04-01	154664
2012-07-01	162515
2012-10-01	161692
2013-01-01	152763
2013-04-01	154462
2013-07-01	160065
2013-10-01	155020
2014-01-01	163294
2014-04-01	161232
2014-07-01	160832
2014-10-01	149643
2015-01-01	137192
2015-04-01	129670
2015-07-01	129973
2015-10-01	121359
2016-01-01	130366
2016-04-01	134159
2016-07-01	136347
2016-10-01	114163
2017-01-01	114799
2017-04-01	124730
2017-07-01	133434
2017-10-01	125268
2018-01-01	129877