Quarter	Billions of US Dollars
1989-07-01	55.123
1989-10-01	50.610
1990-01-01	55.086
1990-04-01	58.645
1990-07-01	63.220
1990-10-01	56.074
1991-01-01	63.500
1991-04-01	64.053
1991-07-01	62.013
1991-10-01	60.890
1992-01-01	65.186
1992-04-01	67.533
1992-07-01	66.354
1992-10-01	65.270
1993-01-01	59.739
1993-04-01	61.019
1993-07-01	65.488
1993-10-01	64.969
1994-01-01	64.685
1994-04-01	67.249
1994-07-01	67.667
1994-10-01	60.754
1995-01-01	56.476
1995-04-01	55.384
1995-07-01	57.127
1995-10-01	55.760
1996-01-01	56.555
1996-04-01	66.952
1996-07-01	63.229
1996-10-01	64.591
1997-01-01	67.853
1997-04-01	69.652
1997-07-01	72.259
1997-10-01	66.439
1998-01-01	72.856
1998-04-01	77.626
1998-07-01	83.120
1998-10-01	77.806
1999-01-01	85.649
1999-04-01	81.664
1999-07-01	84.370
1999-10-01	81.841
2000-01-01	77.762
2000-04-01	82.720
2000-07-01	94.436
2000-10-01	107.940
2001-01-01	108.996
2001-04-01	106.364
2001-07-01	97.189
2001-10-01	99.460
2002-01-01	96.269
2002-04-01	99.660
2002-07-01	99.829
2002-10-01	91.576
2003-01-01	101.082
2003-04-01	97.050
2003-07-01	95.279
2003-10-01	104.834
2004-01-01	111.250
2004-04-01	109.313
2004-07-01	118.761
2004-10-01	127.012
2005-01-01	128.367
2005-04-01	128.421
2005-07-01	121.182
2005-10-01	120.490
2006-01-01	142.761
2006-04-01	138.609
2006-07-01	156.970
2006-10-01	180.009
2007-01-01	219.222
2007-04-01	238.537
2007-07-01	245.994
2007-10-01	230.484
2008-01-01	223.819
2008-04-01	206.184
2008-07-01	220.484
2008-10-01	204.179
2009-01-01	183.552
2009-04-01	176.001
2009-07-01	180.431
2009-10-01	174.102
2010-01-01	182.041
2010-04-01	158.590
2010-07-01	154.805
2010-10-01	160.282
2011-01-01	169.554
2011-04-01	164.965
2011-07-01	177.824
2011-10-01	175.428
2012-01-01	169.439
2012-04-01	174.451
2012-07-01	178.606
2012-10-01	203.259
2013-01-01	209.606
2013-04-01	211.666
2013-07-01	225.262
2013-10-01	192.799
2014-01-01	194.655
2014-04-01	209.458
2014-07-01	215.577
2014-10-01	218.265
2015-01-01	233.218
2015-04-01	217.139