Quarter	Billions of US Dollars
1992-07-01	33.058
1992-10-01	33.359
1993-01-01	34.603
1993-04-01	34.994
1993-07-01	35.334
1993-10-01	36.700
1994-01-01	38.193
1994-04-01	39.712
1994-07-01	42.215
1994-10-01	46.537
1995-01-01	50.970
1995-04-01	53.314
1995-07-01	54.689
1995-10-01	55.710
1996-01-01	57.851
1996-04-01	59.106
1996-07-01	61.091
1996-10-01	63.046
1997-01-01	62.391
1997-04-01	63.703
1997-07-01	66.219
1997-10-01	68.245
1998-01-01	68.946
1998-04-01	70.517
1998-07-01	70.917
1998-10-01	71.881
1999-01-01	74.966
1999-04-01	76.772
1999-07-01	77.459
1999-10-01	83.968
2000-01-01	88.662
2000-04-01	89.602
2000-07-01	93.271
2000-10-01	97.799
2001-01-01	97.944
2001-04-01	100.601
2001-07-01	99.798
2001-10-01	101.588
2002-01-01	97.858
2002-04-01	100.865
2002-07-01	100.236
2002-10-01	103.124
2003-01-01	103.028
2003-04-01	107.079
2003-07-01	105.671
2003-10-01	108.094
2004-01-01	107.187
2004-04-01	108.764
2004-07-01	110.478
2004-10-01	115.491
2005-01-01	115.841
2005-04-01	116.599
2005-07-01	120.077
2005-10-01	121.165
2006-01-01	123.445
2006-04-01	130.475
2006-07-01	135.372
2006-10-01	144.812
2007-01-01	153.381
2007-04-01	158.425
2007-07-01	166.150
2007-10-01	178.408
2008-01-01	192.234
2008-04-01	207.396
2008-07-01	197.913
2008-10-01	173.576
2009-01-01	163.687
2009-04-01	175.802
2009-07-01	184.298
2009-10-01	184.590
2010-01-01	187.486
2010-04-01	184.023
2010-07-01	199.032
2010-10-01	207.564
2011-01-01	213.867
2011-04-01	216.549
2011-07-01	201.628
2011-10-01	199.266
2012-01-01	208.753
2012-04-01	197.442
2012-07-01	198.273
2012-10-01	209.528
2013-01-01	211.881
2013-04-01	214.257
2013-07-01	220.956
2013-10-01	225.417
2014-01-01	224.047
2014-04-01	228.482
2014-07-01	217.398
2014-10-01	203.491
2015-01-01	202.435
2015-04-01	208.802
2015-07-01	203.079
2015-10-01	207.003
2016-01-01	213.790
2016-04-01	214.723
2016-07-01	222.383
2016-10-01	221.478
2017-01-01	232.704
2017-04-01	245.406
2017-07-01	249.905
2017-10-01	250.853
2018-01-01	256.445