Quarter	Billions of US Dollars
1987-01-01	26.482
1987-04-01	27.520
1987-07-01	27.164
1987-10-01	29.821
1988-01-01	30.979
1988-04-01	31.859
1988-07-01	31.649
1988-10-01	33.011
1989-01-01	34.079
1989-04-01	33.241
1989-07-01	34.183
1989-10-01	36.247
1990-01-01	37.619
1990-04-01	39.345
1990-07-01	43.405
1990-10-01	45.507
1991-01-01	44.907
1991-04-01	48.872
1991-07-01	54.739
1991-10-01	63.382
1992-01-01	64.294
1992-04-01	69.978
1992-07-01	74.480
1992-10-01	71.354
1993-01-01	72.734
1993-04-01	71.143
1993-07-01	82.341
1993-10-01	84.537
1994-01-01	90.376
1994-04-01	92.292
1994-07-01	97.100
1994-10-01	96.951
1995-01-01	103.565
1995-04-01	103.710
1995-07-01	102.451
1995-10-01	106.573
1996-01-01	103.038
1996-04-01	105.503
1996-07-01	108.106
1996-10-01	106.939
1997-01-01	105.131
1997-04-01	102.247
1997-07-01	103.950
1997-10-01	100.987
1998-01-01	102.361
1998-04-01	103.218
1998-07-01	109.683
1998-10-01	110.633
1999-01-01	109.481
1999-04-01	110.545
1999-07-01	116.996
1999-10-01	121.455
2000-01-01	123.266
2000-04-01	128.143
2000-07-01	124.767
2000-10-01	127.659
2001-01-01	126.166
2001-04-01	128.960
2001-07-01	138.592
2001-10-01	135.994
2002-01-01	141.670
2002-04-01	167.702
2002-07-01	169.726
2002-10-01	186.282
2003-01-01	205.738
2003-04-01	222.942
2003-07-01	236.625
2003-10-01	266.533
2004-01-01	274.116
2004-04-01	275.689
2004-07-01	293.572
2004-10-01	334.199
2005-01-01	339.129
2005-04-01	342.844
2005-07-01	349.032
2005-10-01	361.173
2006-01-01	386.872
2006-04-01	422.314
2006-07-01	432.173
2006-10-01	496.402
2007-01-01	526.830
2007-04-01	572.059
2007-07-01	586.475
2007-10-01	631.062
2008-01-01	698.122
2008-04-01	758.906
2008-07-01	708.998
2008-10-01	660.536
2009-01-01	621.998
2009-04-01	663.961
2009-07-01	700.113
2009-10-01	704.559
2010-01-01	712.487
2010-04-01	651.422
2010-07-01	739.424
2010-10-01	735.153
2011-01-01	816.061
2011-04-01	840.418
2011-07-01	766.653
2011-10-01	729.531
2012-01-01	735.652
2012-04-01	694.896
2012-07-01	707.631
2012-10-01	717.336
2013-01-01	688.446
2013-04-01	693.760
2013-07-01	716.093
2013-10-01	735.702
2014-01-01	738.803
2014-04-01	743.025
2014-07-01	706.044
2014-10-01	661.373
2015-01-01	615.583
2015-04-01	615.620