Quarter	Billions of US Dollars
1993-07-01	19.015
1993-10-01	21.962
1994-01-01	25.438
1994-04-01	25.430
1994-07-01	25.558
1994-10-01	25.844
1995-01-01	23.828
1995-04-01	23.847
1995-07-01	24.214
1995-10-01	25.301
1996-01-01	26.244
1996-04-01	28.976
1996-07-01	30.229
1996-10-01	32.032
1997-01-01	32.736
1997-04-01	36.778
1997-07-01	42.290
1997-10-01	42.101
1998-01-01	44.607
1998-04-01	47.349
1998-07-01	47.119
1998-10-01	46.625
1999-01-01	45.197
1999-04-01	47.664
1999-07-01	48.124
1999-10-01	47.643
2000-01-01	49.198
2000-04-01	50.085
2000-07-01	50.236
2000-10-01	47.920
2001-01-01	49.089
2001-04-01	48.102
2001-07-01	49.307
2001-10-01	48.068
2002-01-01	45.687
2002-04-01	44.854
2002-07-01	43.505
2002-10-01	44.103
2003-01-01	42.926
2003-04-01	42.281
2003-07-01	40.633
2003-10-01	43.145
2004-01-01	42.786
2004-04-01	39.431
2004-07-01	37.372
2004-10-01	37.072
2005-01-01	38.663
2005-04-01	37.989
2005-07-01	39.768
2005-10-01	41.763
2006-01-01	43.822
2006-04-01	43.642
2006-07-01	44.887
2006-10-01	47.571
2007-01-01	49.719
2007-04-01	58.341
2007-07-01	57.141
2007-10-01	60.056
2008-01-01	58.862
2008-04-01	56.661
2008-07-01	55.602
2008-10-01	51.888
2009-01-01	52.027
2009-04-01	53.536
2009-07-01	62.419
2009-10-01	73.567
2010-01-01	82.600
2010-04-01	89.891
2010-07-01	96.522
2010-10-01	101.046
2011-01-01	109.818
2011-04-01	118.899
2011-07-01	121.308
2011-10-01	134.949
2012-01-01	145.106
2012-04-01	150.056
2012-07-01	162.083
2012-10-01	170.319
2013-01-01	179.745
2013-04-01	187.085
2013-07-01	199.882
2013-10-01	214.095
2014-01-01	218.170
2014-04-01	228.777
2014-07-01	239.492
2014-10-01	242.561
2015-01-01	243.440
2015-04-01	260.937