Quarter	Billions of US Dollars
1993-07-01	11.341
1993-10-01	11.135
1994-01-01	11.151
1994-04-01	12.184
1994-07-01	12.973
1994-10-01	11.971
1995-01-01	12.549
1995-04-01	13.046
1995-07-01	12.219
1995-10-01	11.729
1996-01-01	11.871
1996-04-01	12.031
1996-07-01	12.947
1996-10-01	13.258
1997-01-01	12.283
1997-04-01	12.078
1997-07-01	14.269
1997-10-01	14.148
1998-01-01	13.849
1998-04-01	15.110
1998-07-01	15.709
1998-10-01	18.523
1999-01-01	17.008
1999-04-01	19.900
1999-07-01	21.907
1999-10-01	21.168
2000-01-01	19.481
2000-04-01	30.458
2000-07-01	33.853
2000-10-01	46.365
2001-01-01	43.592
2001-04-01	43.829
2001-07-01	49.036
2001-10-01	48.641
2002-01-01	46.230
2002-04-01	48.904
2002-07-01	47.149
2002-10-01	46.872
2003-01-01	46.322
2003-04-01	51.006
2003-07-01	47.781
2003-10-01	54.600
2004-01-01	51.547
2004-04-01	48.644
2004-07-01	46.434
2004-10-01	49.864
2005-01-01	45.434
2005-04-01	44.629
2005-07-01	45.608
2005-10-01	44.397
2006-01-01	46.064
2006-04-01	46.969
2006-07-01	46.536
2006-10-01	52.079
2007-01-01	52.195
2007-04-01	54.150
2007-07-01	50.869
2007-10-01	56.321
2008-01-01	62.753
2008-04-01	61.818
2008-07-01	58.573
2008-10-01	60.196
2009-01-01	63.271
2009-04-01	66.331
2009-07-01	69.092
2009-10-01	71.387
2010-01-01	67.379
2010-04-01	64.781
2010-07-01	74.198
2010-10-01	76.914
2011-01-01	81.119
2011-04-01	83.985
2011-07-01	93.148
2011-10-01	94.817
2012-01-01	101.695
2012-04-01	102.782
2012-07-01	109.102
2012-10-01	113.292
2013-01-01	114.729
2013-04-01	121.866
2013-07-01	125.447
2013-10-01	124.768
2014-01-01	122.777
2014-04-01	120.525
2014-07-01	111.058
2014-10-01	107.545
2015-01-01	100.381
2015-04-01	104.016