Quarter	Billions of US Dollars
1993-07-01	10.826
1993-10-01	14.735
1994-01-01	16.004
1994-04-01	19.167
1994-07-01	21.305
1994-10-01	22.322
1995-01-01	22.377
1995-04-01	23.569
1995-07-01	25.947
1995-10-01	26.368
1996-01-01	28.101
1996-04-01	30.746
1996-07-01	32.675
1996-10-01	37.541
1997-01-01	40.430
1997-04-01	44.791
1997-07-01	47.813
1997-10-01	48.755
1998-01-01	48.604
1998-04-01	49.491
1998-07-01	49.043
1998-10-01	49.227
1999-01-01	48.560
1999-04-01	48.466
1999-07-01	48.500
1999-10-01	48.186
2000-01-01	49.216
2000-04-01	48.584
2000-07-01	48.538
2000-10-01	48.273
2001-01-01	47.498
2001-04-01	48.544
2001-07-01	49.057
2001-10-01	48.387
2002-01-01	50.201
2002-04-01	53.208
2002-07-01	52.902
2002-10-01	52.830
2003-01-01	53.882
2003-04-01	55.052
2003-07-01	57.107
2003-10-01	57.563
2004-01-01	60.019
2004-04-01	63.259
2004-07-01	64.846
2004-10-01	66.292
2005-01-01	67.774
2005-04-01	69.073
2005-07-01	71.361
2005-10-01	72.888
2006-01-01	73.913
2006-04-01	75.575
2006-07-01	77.007
2006-10-01	78.449
2007-01-01	79.224
2007-04-01	84.160
2007-07-01	83.395
2007-10-01	85.858
2008-01-01	85.873
2008-04-01	84.910
2008-07-01	84.903
2008-10-01	84.161
2009-01-01	80.974
2009-04-01	84.497
2009-07-01	87.163
2009-10-01	92.196
2010-01-01	90.982
2010-04-01	91.939
2010-07-01	93.709
2010-10-01	97.662
2011-01-01	99.641
2011-04-01	110.189
2011-07-01	112.588
2011-10-01	113.598
2012-01-01	116.758
2012-04-01	121.192
2012-07-01	124.186
2012-10-01	129.906
2013-01-01	139.313
2013-04-01	147.633
2013-07-01	153.949
2013-10-01	161.502
2014-01-01	164.879
2014-04-01	170.784
2014-07-01	177.607
2014-10-01	183.503
2015-01-01	183.760
2015-04-01	190.264