Quarter	Billions of US Dollars
1989-07-01	11.906
1989-10-01	11.114
1990-01-01	12.043
1990-04-01	12.309
1990-07-01	15.272
1990-10-01	19.057
1991-01-01	21.494
1991-04-01	23.637
1991-07-01	25.619
1991-10-01	26.787
1992-01-01	28.711
1992-04-01	33.225
1992-07-01	39.370
1992-10-01	37.025
1993-01-01	28.784
1993-04-01	28.442
1993-07-01	35.881
1993-10-01	37.751
1994-01-01	42.366
1994-04-01	42.295
1994-07-01	42.050
1994-10-01	41.078
1995-01-01	40.104
1995-04-01	43.434
1995-07-01	50.250
1995-10-01	56.986
1996-01-01	57.277
1996-04-01	69.107
1996-07-01	63.025
1996-10-01	70.220
1997-01-01	69.225
1997-04-01	77.317
1997-07-01	83.384
1997-10-01	83.440
1998-01-01	84.497
1998-04-01	78.573
1998-07-01	86.949
1998-10-01	93.636
1999-01-01	98.641
1999-04-01	108.967
1999-07-01	134.304
1999-10-01	151.436
2000-01-01	169.237
2000-04-01	204.232
2000-07-01	207.503
2000-10-01	231.031
2001-01-01	207.380
2001-04-01	171.392
2001-07-01	152.491
2001-10-01	138.244
2002-01-01	125.621
2002-04-01	141.454
2002-07-01	140.545
2002-10-01	136.564
2003-01-01	144.623
2003-04-01	139.416
2003-07-01	135.737
2003-10-01	137.854
2004-01-01	163.746
2004-04-01	169.504
2004-07-01	162.812
2004-10-01	170.248
2005-01-01	171.501
2005-04-01	165.773
2005-07-01	184.757
2005-10-01	171.571
2006-01-01	183.931
2006-04-01	196.469
2006-07-01	197.113
2006-10-01	216.887
2007-01-01	235.295
2007-04-01	271.631
2007-07-01	332.498
2007-10-01	395.740
2008-01-01	466.811
2008-04-01	510.770
2008-07-01	442.661
2008-10-01	350.915
2009-01-01	324.871
2009-04-01	291.863
2009-07-01	305.027
2009-10-01	263.740
2010-01-01	286.040
2010-04-01	270.700
2010-07-01	317.931
2010-10-01	298.913
2011-01-01	317.073
2011-04-01	311.502
2011-07-01	285.727
2011-10-01	266.180
2012-01-01	353.615
2012-04-01	349.065
2012-07-01	333.511
2012-10-01	338.379
2013-01-01	326.876
2013-04-01	346.783
2013-07-01	354.241
2013-10-01	385.097
2014-01-01	356.545
2014-04-01	373.865
2014-07-01	374.747
2014-10-01	361.847
2015-01-01	357.728
2015-04-01	375.275