Quarter	Billions of US Dollars
1977-10-01	359.368
1978-01-01	390.395
1978-04-01	403.703
1978-07-01	421.869
1978-10-01	453.828
1979-01-01	448.033
1979-04-01	461.514
1979-07-01	488.807
1979-10-01	520.671
1980-01-01	471.999
1980-04-01	545.321
1980-07-01	544.425
1980-10-01	525.501
1981-01-01	494.298
1981-04-01	438.450
1981-07-01	462.527
1981-10-01	472.870
1982-01-01	443.433
1982-04-01	418.907
1982-07-01	410.368
1982-10-01	456.960
1983-01-01	431.528
1983-04-01	423.733
1983-07-01	412.764
1983-10-01	417.102
1984-01-01	442.074
1984-04-01	424.793
1984-07-01	398.450
1984-10-01	395.894
1985-01-01	402.975
1985-04-01	411.046
1985-07-01	470.504
1985-10-01	522.103
1986-01-01	563.670
1986-04-01	581.612
1986-07-01	615.317
1986-10-01	644.945
1987-01-01	714.165
1987-04-01	713.792
1987-07-01	716.750
1987-10-01	836.850
1988-01-01	819.328
1988-04-01	770.055
1988-07-01	763.232
1988-10-01	840.765
1989-01-01	808.117
1989-04-01	808.264
1989-07-01	865.833
1989-10-01	987.814
1990-01-01	1026.639
1990-04-01	1064.662
1990-07-01	1156.300
1990-10-01	1232.943
1991-01-01	1095.981
1991-04-01	1046.436
1991-07-01	1149.278
1991-10-01	1281.091
1992-01-01	1214.318
1992-04-01	1340.205
1992-07-01	1441.608
1992-10-01	1281.340
1993-01-01	1308.094
1993-04-01	1257.984
1993-07-01	1260.140
1993-10-01	1187.492
1994-01-01	1236.240
1994-04-01	1284.441
1994-07-01	1329.192
1994-10-01	1346.669
1995-01-01	1491.417
1995-04-01	1508.688
1995-07-01	1496.822
1995-10-01	1505.107
1996-01-01	1466.722
1996-04-01	1441.403
1996-07-01	1426.620
1996-10-01	1427.901
1997-01-01	1339.759
1997-04-01	1300.250
1997-07-01	1291.045
1997-10-01	1287.806
1998-01-01	1271.524
1998-04-01	1307.407
1998-07-01	1413.073
1998-10-01	1415.586
1999-01-01	1317.780
1999-04-01	1302.229
1999-07-01	1364.892
1999-10-01	1322.242
2000-01-01	1273.169
2000-04-01	1311.549
2000-07-01	1244.503
2000-10-01	1351.264
2001-01-01	1317.038
2001-04-01	1299.615
2001-07-01	1420.847
2001-10-01	1391.548
2002-01-01	1391.623
2002-04-01	1596.603
2002-07-01	1579.357
2002-10-01	1697.395
2003-01-01	1789.647
2003-04-01	1888.048
2003-07-01	1918.656
2003-10-01	2059.920
2004-01-01	2012.712
2004-04-01	2036.417
2004-07-01	2101.727
2004-10-01	2329.706
2005-01-01	2228.154
2005-04-01	2124.913
2005-07-01	2129.495
2005-10-01	2115.216
2006-01-01	2198.003
2006-04-01	2353.496
2006-07-01	2371.314
2006-10-01	2510.012
2007-01-01	2575.924
2007-04-01	2680.461
2007-07-01	2855.483
2007-10-01	2977.985
2008-01-01	3247.979
2008-04-01	3335.898
2008-07-01	3090.860
2008-10-01	3023.143
2009-01-01	2902.148
2009-04-01	3093.279
2009-07-01	3199.053
2009-10-01	3146.088
2010-01-01	2952.853
2010-04-01	2693.242
2010-07-01	3012.212
2010-10-01	2983.232
2011-01-01	3205.731
2011-04-01	3343.233
2011-07-01	3199.668
2011-10-01	3111.758
2012-01-01	3274.420
2012-04-01	3145.625
2012-07-01	3245.811
2012-10-01	3321.953
2013-01-01	3230.211
2013-04-01	3274.137
2013-07-01	3396.673
2013-10-01	3467.062
2014-01-01	3522.043
2014-04-01	3555.042
2014-07-01	3330.223
2014-10-01	3251.782
2015-01-01	2944.836
2015-04-01	3069.381
2015-07-01	3084.298
2015-10-01	3040.524
2016-01-01	3203.872
2016-04-01	3191.524
2016-07-01	3234.532
2016-10-01	3091.486
2017-01-01	3197.323
2017-04-01	3430.153
2017-07-01	3587.824
2017-10-01	3674.171
2018-01-01	3808.369