Quarter	Millions of US Dollars
1995-01-01	39566
1995-04-01	40514
1995-07-01	42783
1995-10-01	43649
1996-01-01	45680
1996-04-01	45368
1996-07-01	47920
1996-10-01	49556
1997-01-01	51319
1997-04-01	49933
1997-07-01	52825
1997-10-01	51528
1998-01-01	51597
1998-04-01	51068
1998-07-01	50954
1998-10-01	49991
1999-01-01	57320
1999-04-01	58287
1999-07-01	57036
1999-10-01	59754
2000-01-01	63047
2000-04-01	62241
2000-07-01	62760
2000-10-01	62212
2001-01-01	61623
2001-04-01	64244
2001-07-01	63437
2001-10-01	65282
2002-01-01	64580
2002-04-01	63871
2002-07-01	63060
2002-10-01	66081
2003-01-01	68866
2003-04-01	77093
2003-07-01	77498
2003-10-01	81087
2004-01-01	81452
2004-04-01	84071
2004-07-01	86372
2004-10-01	91950
2005-01-01	95371
2005-04-01	95581
2005-07-01	99132
2005-10-01	99310
2006-01-01	101444
2006-04-01	102566
2006-07-01	107684
2006-10-01	113666
2007-01-01	118190
2007-04-01	120408
2007-07-01	130332
2007-10-01	140383
2008-01-01	153369
2008-04-01	169165
2008-07-01	162014
2008-10-01	146677
2009-01-01	144218
2009-04-01	162064
2009-07-01	176838
2009-10-01	178450
2010-01-01	185947
2010-04-01	180198
2010-07-01	198196
2010-10-01	205403
2011-01-01	207890
2011-04-01	208465
2011-07-01	195872
2011-10-01	195891
2012-01-01	205496
2012-04-01	195436
2012-07-01	202481
2012-10-01	219067
2013-01-01	226422
2013-04-01	231447
2013-07-01	238747
2013-10-01	243911
2014-01-01	245765
2014-04-01	253228
2014-07-01	239941
2014-10-01	225464
2015-01-01	223973
2015-04-01	228867
2015-07-01	223652
2015-10-01	224664
2016-01-01	237537
2016-04-01	235184
2016-07-01	241561
2016-10-01	232903
2017-01-01	245336
2017-04-01	258677
2017-07-01	257043
2017-10-01	259854
2018-01-01	261086