Quarter	Billions of US Dollars
1993-07-01	14.032
1993-10-01	14.952
1994-01-01	14.975
1994-04-01	16.144
1994-07-01	17.378
1994-10-01	17.718
1995-01-01	19.959
1995-04-01	23.525
1995-07-01	24.665
1995-10-01	28.273
1996-01-01	32.184
1996-04-01	34.433
1996-07-01	33.721
1996-10-01	41.205
1997-01-01	43.648
1997-04-01	49.915
1997-07-01	53.938
1997-10-01	62.518
1998-01-01	67.162
1998-04-01	67.210
1998-07-01	69.247
1998-10-01	72.325
1999-01-01	83.965
1999-04-01	86.916
1999-07-01	109.583
1999-10-01	127.125
2000-01-01	141.023
2000-04-01	162.564
2000-07-01	167.061
2000-10-01	173.734
2001-01-01	175.051
2001-04-01	169.258
2001-07-01	170.321
2001-10-01	172.916
2002-01-01	192.736
2002-04-01	221.312
2002-07-01	234.586
2002-10-01	236.608
2003-01-01	265.349
2003-04-01	256.051
2003-07-01	238.319
2003-10-01	279.846
2004-01-01	260.005
2004-04-01	279.879
2004-07-01	295.721
2004-10-01	321.922
2005-01-01	304.171
2005-04-01	272.102
2005-07-01	264.865
2005-10-01	262.939
2006-01-01	283.409
2006-04-01	298.327
2006-07-01	316.141
2006-10-01	335.311
2007-01-01	373.893
2007-04-01	413.777
2007-07-01	422.924
2007-10-01	448.658
2008-01-01	475.513
2008-04-01	462.679
2008-07-01	440.321
2008-10-01	418.818
2009-01-01	364.928
2009-04-01	380.154
2009-07-01	368.851
2009-10-01	359.846
2010-01-01	366.112
2010-04-01	343.703
2010-07-01	364.188
2010-10-01	338.346
2011-01-01	351.118
2011-04-01	351.062
2011-07-01	381.797
2011-10-01	413.337
2012-01-01	433.708
2012-04-01	437.446
2012-07-01	429.440
2012-10-01	425.519
2013-01-01	424.439
2013-04-01	428.051
2013-07-01	412.679
2013-10-01	397.686
2014-01-01	398.880
2014-04-01	406.846
2014-07-01	414.262
2014-10-01	453.350
2015-01-01	430.459
2015-04-01	418.853