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	55106
2002-01-01	97130
2002-04-01	76119
2002-07-01	78247
2002-10-01	87057
2003-01-01	108541
2003-04-01	115498
2003-07-01	111330
2003-10-01	109672
2004-01-01	109762
2004-04-01	106193
2004-07-01	105031
2004-10-01	105904
2005-01-01	90726
2005-04-01	91898
2005-07-01	91256
2005-10-01	87160
2006-01-01	94737
2006-04-01	94440
2006-07-01	94045
2006-10-01	94935
2007-01-01	101982
2007-04-01	102919
2007-07-01	100562
2007-10-01	100795
2008-01-01	107325
2008-04-01	112159
2008-07-01	108839
2008-10-01	98400
2009-01-01	90436
2009-04-01	88690
2009-07-01	87315
2009-10-01	88251
2010-01-01	98151
2010-04-01	96727
2010-07-01	95910
2010-10-01	95656
2011-01-01	103968
2011-04-01	102583
2011-07-01	100131
2011-10-01	97850
2012-01-01	106322
2012-04-01	104481
2012-07-01	99046
2012-10-01	94484
2013-01-01	116112
2013-04-01	110604
2013-07-01	102647
2013-10-01	91212
2014-01-01	102691
2014-04-01	101067
2014-07-01	96906
2014-10-01	97063
2015-01-01	160858
2015-04-01	156022
2015-07-01	150449
2015-10-01	109511
2016-01-01	164465
2016-04-01	160877
2016-07-01	156791
2016-10-01	151131
2017-01-01	234932
2017-04-01	219709
2017-07-01	206704