Quarter	Billions of US Dollars
1992-07-01	77.850
1992-10-01	76.088
1993-01-01	78.683
1993-04-01	79.278
1993-07-01	80.564
1993-10-01	79.453
1994-01-01	81.963
1994-04-01	82.899
1994-07-01	86.000
1994-10-01	88.724
1995-01-01	91.407
1995-04-01	93.587
1995-07-01	95.504
1995-10-01	94.653
1996-01-01	98.454
1996-04-01	99.084
1996-07-01	101.830
1996-10-01	103.707
1997-01-01	104.423
1997-04-01	101.686
1997-07-01	106.528
1997-10-01	105.272
1998-01-01	105.884
1998-04-01	105.424
1998-07-01	103.271
1998-10-01	101.626
1999-01-01	103.723
1999-04-01	103.943
1999-07-01	102.130
1999-10-01	104.932
2000-01-01	108.016
2000-04-01	107.626
2000-07-01	108.317
2000-10-01	106.410
2001-01-01	103.688
2001-04-01	105.546
2001-07-01	104.268
2001-10-01	104.830
2002-01-01	103.211
2002-04-01	105.493
2002-07-01	105.902
2002-10-01	109.403
2003-01-01	112.241
2003-04-01	121.023
2003-07-01	120.127
2003-10-01	122.472
2004-01-01	121.134
2004-04-01	121.883
2004-07-01	123.284
2004-10-01	128.060
2005-01-01	128.079
2005-04-01	121.986
2005-07-01	122.592
2005-10-01	122.520
2006-01-01	119.568
2006-04-01	123.836
2006-07-01	127.087
2006-10-01	130.040
2007-01-01	131.175
2007-04-01	125.037
2007-07-01	131.495
2007-10-01	139.811
2008-01-01	148.225
2008-04-01	158.880
2008-07-01	158.300
2008-10-01	146.610
2009-01-01	136.996
2009-04-01	150.007
2009-07-01	159.433
2009-10-01	160.760
2010-01-01	163.578
2010-04-01	155.491
2010-07-01	167.853
2010-10-01	174.652
2011-01-01	179.185
2011-04-01	180.658
2011-07-01	168.880
2011-10-01	168.690
2012-01-01	175.005
2012-04-01	167.981
2012-07-01	171.441
2012-10-01	181.993
2013-01-01	189.139
2013-04-01	193.178
2013-07-01	199.516
2013-10-01	204.431
2014-01-01	204.752
2014-04-01	209.052
2014-07-01	195.497
2014-10-01	187.769
2015-01-01	182.532
2015-04-01	193.403
2015-07-01	188.327
2015-10-01	189.972
2016-01-01	197.676
2016-04-01	195.879
2016-07-01	200.146
2016-10-01	196.260
2017-01-01	208.319
2017-04-01	219.175
2017-07-01	217.836
2017-10-01	219.083
2018-01-01	220.649