Quarter	Millions of US Dollars
1995-01-01	58171
1995-04-01	58171
1995-07-01	58171
1995-10-01	58171
1996-01-01	68524
1996-04-01	68524
1996-07-01	68524
1996-10-01	68524
1997-01-01	73861
1997-04-01	73861
1997-07-01	73861
1997-10-01	73861
1998-01-01	78022
1998-04-01	78022
1998-07-01	78022
1998-10-01	78022
1999-01-01	85688
1999-04-01	85688
1999-07-01	85688
1999-10-01	85688
2000-01-01	89563
2000-04-01	89563
2000-07-01	89545
2000-10-01	89689
2001-01-01	55051
2001-04-01	55029
2001-07-01	54930
2001-10-01	75455
2002-01-01	103847
2002-04-01	94733
2002-07-01	97472
2002-10-01	106870
2003-01-01	127937
2003-04-01	135770
2003-07-01	132201
2003-10-01	130542
2004-01-01	131295
2004-04-01	128683
2004-07-01	127360
2004-10-01	128079
2005-01-01	112535
2005-04-01	115843
2005-07-01	115430
2005-10-01	110022
2006-01-01	118311
2006-04-01	118672
2006-07-01	119347
2006-10-01	121134
2007-01-01	130928
2007-04-01	136280
2007-07-01	131430
2007-10-01	128965
2008-01-01	137052
2008-04-01	139692
2008-07-01	135678
2008-10-01	119600
2009-01-01	109417
2009-04-01	106797
2009-07-01	107089
2009-10-01	108574
2010-01-01	118848
2010-04-01	119266
2010-07-01	121627
2010-10-01	121770
2011-01-01	132707
2011-04-01	132963
2011-07-01	127738
2011-10-01	122259
2012-01-01	132912
2012-04-01	131937
2012-07-01	125472
2012-10-01	119003
2013-01-01	143231
2013-04-01	136581
2013-07-01	128891
2013-10-01	114852
2014-01-01	128049
2014-04-01	131321
2014-07-01	130999
2014-10-01	133513
2015-01-01	201837
2015-04-01	200436
2015-07-01	193486
2015-10-01	146046
2016-01-01	208387
2016-04-01	205594
2016-07-01	210637
2016-10-01	203011
2017-01-01	294760
2017-04-01	286363
2017-07-01	280904