Quarter	Billions of US Dollars
1995-10-01	48.838
1996-01-01	47.100
1996-04-01	45.871
1996-07-01	45.329
1996-10-01	45.644
1997-01-01	44.785
1997-04-01	37.002
1997-07-01	39.975
1997-10-01	39.097
1998-01-01	37.434
1998-04-01	35.826
1998-07-01	36.951
1998-10-01	35.094
1999-01-01	33.228
1999-04-01	34.936
1999-07-01	38.647
1999-10-01	38.289
2000-01-01	37.321
2000-04-01	37.594
2000-07-01	39.471
2000-10-01	47.884
2001-01-01	48.272
2001-04-01	41.079
2001-07-01	45.463
2001-10-01	46.302
2002-01-01	48.116
2002-04-01	56.981
2002-07-01	62.948
2002-10-01	75.321
2003-01-01	81.393
2003-04-01	90.826
2003-07-01	91.700
2003-10-01	103.734
2004-01-01	102.928
2004-04-01	116.264
2004-07-01	123.933
2004-10-01	128.111
2005-01-01	125.115
2005-04-01	120.704
2005-07-01	126.749
2005-10-01	123.438
2006-01-01	130.188
2006-04-01	148.607
2006-07-01	158.379
2006-10-01	185.339
2007-01-01	182.483
2007-04-01	183.889
2007-07-01	211.761
2007-10-01	213.869
2008-01-01	198.023
2008-04-01	194.316
2008-07-01	186.354
2008-10-01	175.771
2009-01-01	170.836
2009-04-01	168.227
2009-07-01	191.084
2009-10-01	177.000
2010-01-01	172.321
2010-04-01	165.291
2010-07-01	184.194
2010-10-01	187.979
2011-01-01	201.314
2011-04-01	203.342
2011-07-01	179.276
2011-10-01	134.561
2012-01-01	155.758
2012-04-01	143.870
2012-07-01	154.153
2012-10-01	160.097
2013-01-01	160.869
2013-04-01	156.985
2013-07-01	155.360
2013-10-01	154.173
2014-01-01	155.240
2014-04-01	142.507
2014-07-01	132.838
2014-10-01	120.180
2015-01-01	117.600
2015-04-01	120.324
2015-07-01	117.952
2015-10-01	116.344
2016-01-01	127.012
2016-04-01	134.044
2016-07-01	137.142
2016-10-01	130.783
2017-01-01	140.016
2017-04-01	140.067
2017-07-01	146.417
2017-10-01	147.856
2018-01-01	156.583