Quarter	Billions of US Dollars
1992-07-01	19.457
1992-10-01	19.221
1993-01-01	19.616
1993-04-01	20.699
1993-07-01	21.274
1993-10-01	23.333
1994-01-01	24.610
1994-04-01	25.949
1994-07-01	27.524
1994-10-01	29.182
1995-01-01	30.742
1995-04-01	32.261
1995-07-01	32.916
1995-10-01	33.493
1996-01-01	35.672
1996-04-01	36.943
1996-07-01	37.685
1996-10-01	39.079
1997-01-01	39.295
1997-04-01	38.397
1997-07-01	41.061
1997-10-01	42.141
1998-01-01	41.498
1998-04-01	42.247
1998-07-01	41.174
1998-10-01	40.650
1999-01-01	42.243
1999-04-01	42.764
1999-07-01	42.320
1999-10-01	44.958
2000-01-01	46.933
2000-04-01	47.567
2000-07-01	49.146
2000-10-01	49.044
2001-01-01	47.027
2001-04-01	48.256
2001-07-01	47.360
2001-10-01	47.175
2002-01-01	44.901
2002-04-01	46.009
2002-07-01	45.706
2002-10-01	46.976
2003-01-01	47.131
2003-04-01	51.148
2003-07-01	49.959
2003-10-01	50.583
2004-01-01	49.298
2004-04-01	50.058
2004-07-01	50.486
2004-10-01	52.839
2005-01-01	52.415
2005-04-01	50.647
2005-07-01	51.316
2005-10-01	52.707
2006-01-01	52.160
2006-04-01	55.437
2006-07-01	58.020
2006-10-01	58.475
2007-01-01	59.057
2007-04-01	59.940
2007-07-01	65.665
2007-10-01	70.498
2008-01-01	77.112
2008-04-01	84.396
2008-07-01	84.664
2008-10-01	77.187
2009-01-01	69.806
2009-04-01	76.747
2009-07-01	82.493
2009-10-01	83.817
2010-01-01	86.572
2010-04-01	85.272
2010-07-01	94.005
2010-10-01	97.858
2011-01-01	101.399
2011-04-01	105.914
2011-07-01	98.546
2011-10-01	97.140
2012-01-01	101.328
2012-04-01	97.031
2012-07-01	99.635
2012-10-01	105.404
2013-01-01	109.405
2013-04-01	112.046
2013-07-01	117.406
2013-10-01	121.483
2014-01-01	121.338
2014-04-01	125.470
2014-07-01	119.288
2014-10-01	114.894
2015-01-01	112.915
2015-04-01	121.713
2015-07-01	119.256
2015-10-01	121.961
2016-01-01	127.694
2016-04-01	127.585
2016-07-01	133.556
2016-10-01	131.498
2017-01-01	140.834
2017-04-01	148.692
2017-07-01	149.017
2017-10-01	152.999
2018-01-01	152.609