Quarter	Billions of US Dollars
1993-07-01	28.919
1993-10-01	28.317
1994-01-01	31.611
1994-04-01	32.272
1994-07-01	36.736
1994-10-01	39.610
1995-01-01	41.998
1995-04-01	49.206
1995-07-01	47.597
1995-10-01	47.407
1996-01-01	46.382
1996-04-01	48.584
1996-07-01	49.874
1996-10-01	50.021
1997-01-01	48.744
1997-04-01	51.536
1997-07-01	52.231
1997-10-01	50.627
1998-01-01	51.685
1998-04-01	52.885
1998-07-01	53.614
1998-10-01	57.331
1999-01-01	53.220
1999-04-01	56.181
1999-07-01	56.172
1999-10-01	55.971
2000-01-01	59.938
2000-04-01	68.194
2000-07-01	65.572
2000-10-01	66.878
2001-01-01	72.014
2001-04-01	69.078
2001-07-01	70.845
2001-10-01	72.765
2002-01-01	79.113
2002-04-01	82.356
2002-07-01	84.768
2002-10-01	89.317
2003-01-01	101.784
2003-04-01	103.809
2003-07-01	112.526
2003-10-01	120.969
2004-01-01	132.749
2004-04-01	139.705
2004-07-01	138.316
2004-10-01	146.094
2005-01-01	144.045
2005-04-01	141.251
2005-07-01	141.427
2005-10-01	137.521
2006-01-01	139.327
2006-04-01	146.648
2006-07-01	147.260
2006-10-01	141.684
2007-01-01	142.436
2007-04-01	152.244
2007-07-01	150.577
2007-10-01	151.570
2008-01-01	161.388
2008-04-01	160.654
2008-07-01	127.121
2008-10-01	122.870
2009-01-01	120.519
2009-04-01	124.814
2009-07-01	124.676
2009-10-01	129.102
2010-01-01	124.828
2010-04-01	123.037
2010-07-01	143.931
2010-10-01	144.520
2011-01-01	149.032
2011-04-01	153.024
2011-07-01	148.977
2011-10-01	140.901
2012-01-01	146.320
2012-04-01	137.496
2012-07-01	139.822
2012-10-01	136.926
2013-01-01	132.409
2013-04-01	133.035
2013-07-01	135.004
2013-10-01	135.975
2014-01-01	136.381
2014-04-01	135.084
2014-07-01	119.537
2014-10-01	115.543
2015-01-01	100.071
2015-04-01	103.045