Quarter	Millions of US Dollars
1995-01-01	86895
1995-04-01	92667
1995-07-01	92273
1995-10-01	92561
1996-01-01	94440
1996-04-01	96321
1996-07-01	104130
1996-10-01	103618
1997-01-01	97976
1997-04-01	97714
1997-07-01	96704
1997-10-01	96440
1998-01-01	86017
1998-04-01	92789
1998-07-01	98726
1998-10-01	103420
1999-01-01	102630
1999-04-01	101097
1999-07-01	102743
1999-10-01	93022
2000-01-01	91109
2000-04-01	92702
2000-07-01	85582
2000-10-01	91769
2001-01-01	96324
2001-04-01	94195
2001-07-01	102096
2001-10-01	96114
2002-01-01	100628
2002-04-01	120041
2002-07-01	121267
2002-10-01	129314
2003-01-01	143633
2003-04-01	156445
2003-07-01	162058
2003-10-01	175056
2004-01-01	178716
2004-04-01	187734
2004-07-01	196568
2004-10-01	216305
2005-01-01	211492
2005-04-01	207741
2005-07-01	211605
2005-10-01	206575
2006-01-01	218209
2006-04-01	235905
2006-07-01	234951
2006-10-01	244312
2007-01-01	260538
2007-04-01	266619
2007-07-01	284453
2007-10-01	298612
2008-01-01	360373
2008-04-01	366972
2008-07-01	341404
2008-10-01	339652
2009-01-01	352507
2009-04-01	390587
2009-07-01	413535
2009-10-01	407825
2010-01-01	398454
2010-04-01	347214
2010-07-01	389092
2010-10-01	382642
2011-01-01	401504
2011-04-01	408669
2011-07-01	373964
2011-10-01	356577
2012-01-01	200609
2012-04-01	172703
2012-07-01	180211
2012-10-01	140926
2013-01-01	131407
2013-04-01	125019
2013-07-01	125276
2013-10-01	127817
2014-01-01	124955
2014-04-01	115156
2014-07-01	102023
2014-10-01	99836
2015-01-01	88949
2015-04-01	92454
2015-07-01	84974
2015-10-01	82387
2016-01-01	86049
2016-04-01	83676
2016-07-01	80868
2016-10-01	76075
2017-01-01	76692
2017-04-01	80260
2017-07-01	77048
2017-10-01	78436
2018-01-01	83365