Quarter	Billions of US Dollars
1999-10-01	20306.112
2000-01-01	20180.381
2000-04-01	20228.728
2000-07-01	19819.426
2000-10-01	20161.509
2001-01-01	19487.267
2001-04-01	19484.266
2001-07-01	20264.175
2001-10-01	19890.734
2002-01-01	19868.380
2002-04-01	21508.761
2002-07-01	21348.051
2002-10-01	22179.251
2003-01-01	22425.392
2003-04-01	22979.172
2003-07-01	23544.691
2003-10-01	24761.115
2004-01-01	24781.071
2004-04-01	24539.819
2004-07-01	24892.819
2004-10-01	26847.308
2005-01-01	26579.927
2005-04-01	26005.127
2005-07-01	26262.868
2005-10-01	26261.041
2006-01-01	27088.598
2006-04-01	28483.587
2006-07-01	28665.993
2006-10-01	29790.118
2007-01-01	30526.030
2007-04-01	31405.889
2007-07-01	33231.239
2007-10-01	34940.681
2008-01-01	37365.051
2008-04-01	37585.645
2008-07-01	36063.961
2008-10-01	36044.229
2009-01-01	34760.321
2009-04-01	36146.051
2009-07-01	37066.954
2009-10-01	36510.978
2010-01-01	35452.218
2010-04-01	34301.627
2010-07-01	36582.631
2010-10-01	36489.646
2011-01-01	37545.340
2011-04-01	38383.722
2011-07-01	37596.700
2011-10-01	37511.282
2012-01-01	38360.826
2012-04-01	37663.566
2012-07-01	38864.504
2012-10-01	38570.469
2013-01-01	37482.360
2013-04-01	37539.226
2013-07-01	38500.872
2013-10-01	38464.905
2014-01-01	38825.742
2014-04-01	39107.539
2014-07-01	37479.696
2014-10-01	36780.500
2015-01-01	35847.329
2015-04-01	36582.698
2015-07-01	36627.124
2015-10-01	36442.909
2016-01-01	37981.217
2016-04-01	38303.143
2016-07-01	38773.869
2016-10-01	37250.207
2017-01-01	38250.678
2017-04-01	39560.141
2017-07-01	40494.974
2017-10-01	41037.369
2018-01-01	42155.419