Quarter	Billions of US Dollars
1993-07-01	35.952
1993-10-01	37.933
1994-01-01	40.529
1994-04-01	43.321
1994-07-01	47.006
1994-10-01	46.177
1995-01-01	46.718
1995-04-01	47.292
1995-07-01	47.403
1995-10-01	45.618
1996-01-01	48.185
1996-04-01	51.042
1996-07-01	51.263
1996-10-01	62.916
1997-01-01	62.491
1997-04-01	64.610
1997-07-01	67.361
1997-10-01	73.837
1998-01-01	76.720
1998-04-01	79.562
1998-07-01	78.401
1998-10-01	80.990
1999-01-01	80.175
1999-04-01	84.392
1999-07-01	92.477
1999-10-01	95.880
2000-01-01	95.914
2000-04-01	98.226
2000-07-01	103.892
2000-10-01	111.871
2001-01-01	109.646
2001-04-01	110.102
2001-07-01	121.489
2001-10-01	125.072
2002-01-01	121.414
2002-04-01	139.063
2002-07-01	142.616
2002-10-01	150.918
2003-01-01	148.842
2003-04-01	161.202
2003-07-01	171.754
2003-10-01	188.974
2004-01-01	210.369
2004-04-01	222.368
2004-07-01	227.148
2004-10-01	263.956
2005-01-01	273.043
2005-04-01	278.231
2005-07-01	293.061
2005-10-01	325.125
2006-01-01	350.771
2006-04-01	382.821
2006-07-01	405.417
2006-10-01	476.134
2007-01-01	503.759
2007-04-01	541.447
2007-07-01	570.902
2007-10-01	579.121
2008-01-01	570.668
2008-04-01	695.887
2008-07-01	771.356
2008-10-01	808.931
2009-01-01	852.662
2009-04-01	991.337
2009-07-01	996.071
2009-10-01	988.894
2010-01-01	920.043
2010-04-01	886.431
2010-07-01	944.431
2010-10-01	904.288
2011-01-01	901.360
2011-04-01	898.397
2011-07-01	849.026
2011-10-01	822.135
2012-01-01	839.563
2012-04-01	774.645
2012-07-01	795.694
2012-10-01	772.009
2013-01-01	751.530
2013-04-01	753.357
2013-07-01	786.267
2013-10-01	811.548
2014-01-01	806.973
2014-04-01	831.707
2014-07-01	804.892
2014-10-01	762.754
2015-01-01	708.465
2015-04-01	753.398