Quarter	Billions of US Dollars
1993-07-01	62.183
1993-10-01	58.691
1994-01-01	68.219
1994-04-01	65.803
1994-07-01	70.084
1994-10-01	63.500
1995-01-01	66.900
1995-04-01	68.999
1995-07-01	67.453
1995-10-01	67.807
1996-01-01	75.830
1996-04-01	85.775
1996-07-01	82.241
1996-10-01	79.417
1997-01-01	86.739
1997-04-01	81.294
1997-07-01	86.662
1997-10-01	85.322
1998-01-01	89.086
1998-04-01	89.541
1998-07-01	97.585
1998-10-01	93.717
1999-01-01	122.683
1999-04-01	113.161
1999-07-01	128.966
1999-10-01	106.623
2000-01-01	140.981
2000-04-01	141.207
2000-07-01	153.380
2000-10-01	160.820
2001-01-01	193.719
2001-04-01	195.987
2001-07-01	179.217
2001-10-01	178.284
2002-01-01	187.774
2002-04-01	192.249
2002-07-01	222.974
2002-10-01	217.958
2003-01-01	274.450
2003-04-01	271.035
2003-07-01	254.216
2003-10-01	306.411
2004-01-01	324.704
2004-04-01	308.837
2004-07-01	351.712
2004-10-01	376.719
2005-01-01	409.659
2005-04-01	409.280
2005-07-01	397.328
2005-10-01	374.336
2006-01-01	447.507
2006-04-01	464.792
2006-07-01	493.991
2006-10-01	503.161
2007-01-01	620.672
2007-04-01	647.133
2007-07-01	582.505
2007-10-01	554.295
2008-01-01	646.606
2008-04-01	636.480
2008-07-01	627.715
2008-10-01	527.719
2009-01-01	480.107
2009-04-01	474.031
2009-07-01	502.528
2009-10-01	423.804
2010-01-01	471.187
2010-04-01	395.931
2010-07-01	422.155
2010-10-01	382.828
2011-01-01	437.067
2011-04-01	419.687
2011-07-01	457.180
2011-10-01	457.760
2012-01-01	489.002
2012-04-01	421.347
2012-07-01	368.230
2012-10-01	331.613
2013-01-01	381.821
2013-04-01	359.580
2013-07-01	376.508
2013-10-01	331.470
2014-01-01	382.467
2014-04-01	392.613
2014-07-01	377.640
2014-10-01	356.042
2015-01-01	355.383
2015-04-01	310.447