Quarter	Millions of US Dollars
1995-10-01	90315
1996-01-01	90691
1996-04-01	88901
1996-07-01	90777
1996-10-01	90893
1997-01-01	94002
1997-04-01	85864
1997-07-01	93452
1997-10-01	90178
1998-01-01	93658
1998-04-01	96418
1998-07-01	99752
1998-10-01	95375
1999-01-01	97927
1999-04-01	94737
1999-07-01	99024
1999-10-01	97221
2000-01-01	98145
2000-04-01	96088
2000-07-01	94677
2000-10-01	104481
2001-01-01	105763
2001-04-01	102437
2001-07-01	106973
2001-10-01	105441
2002-01-01	109329
2002-04-01	129807
2002-07-01	132388
2002-10-01	141045
2003-01-01	145832
2003-04-01	150315
2003-07-01	158424
2003-10-01	169937
2004-01-01	167857
2004-04-01	170254
2004-07-01	176299
2004-10-01	190563
2005-01-01	186763
2005-04-01	186529
2005-07-01	192927
2005-10-01	193646
2006-01-01	203403
2006-04-01	221065
2006-07-01	228317
2006-10-01	244014
2007-01-01	249243
2007-04-01	260316
2007-07-01	284826
2007-10-01	309131
2008-01-01	340548
2008-04-01	360108
2008-07-01	328500
2008-10-01	318162
2009-01-01	336987
2009-04-01	374928
2009-07-01	429869
2009-10-01	433782
2010-01-01	433574
2010-04-01	418903
2010-07-01	464017
2010-10-01	458869
2011-01-01	494482
2011-04-01	494010
2011-07-01	476042
2011-10-01	466269
2012-01-01	513291
2012-04-01	506295
2012-07-01	532264
2012-10-01	544996
2013-01-01	526030
2013-04-01	513997
2013-07-01	527376
2013-10-01	529416
2014-01-01	538331
2014-04-01	529617
2014-07-01	507752
2014-10-01	468763
2015-01-01	451095
2015-04-01	445324
2015-07-01	429275
2015-10-01	418838
2016-01-01	449144
2016-04-01	442062
2016-07-01	457111
2016-10-01	430507
2017-01-01	440128
2017-04-01	441246
2017-07-01	459397
2017-10-01	455209
2018-01-01	465911