Quarter	Billions of US Dollars
1976-01-01	68.442
1976-04-01	67.136
1976-07-01	66.601
1976-10-01	74.436
1977-01-01	71.663
1977-04-01	75.089
1977-07-01	76.256
1977-10-01	87.119
1978-01-01	88.426
1978-04-01	92.316
1978-07-01	97.872
1978-10-01	101.145
1979-01-01	106.758
1979-04-01	120.350
1979-07-01	122.095
1979-10-01	123.534
1980-01-01	146.361
1980-04-01	163.855
1980-07-01	170.671
1980-10-01	175.077
1981-01-01	169.196
1981-04-01	142.267
1981-07-01	143.590
1981-10-01	174.806
1982-01-01	169.341
1982-04-01	176.219
1982-07-01	172.029
1982-10-01	171.394
1983-01-01	163.538
1983-04-01	172.447
1983-07-01	168.634
1983-10-01	164.992
1984-01-01	170.096
1984-04-01	165.779
1984-07-01	155.313
1984-10-01	158.694
1985-01-01	180.630
1985-04-01	188.571
1985-07-01	204.651
1985-10-01	211.658
1986-01-01	231.065
1986-04-01	238.859
1986-07-01	233.310
1986-10-01	253.899
1987-01-01	289.262
1987-04-01	297.606
1987-07-01	316.651
1987-10-01	366.038
1988-01-01	398.927
1988-04-01	394.023
1988-07-01	408.741
1988-10-01	455.231
1989-01-01	466.334
1989-04-01	455.401
1989-07-01	504.422
1989-10-01	514.480
1990-01-01	592.682
1990-04-01	650.650
1990-07-01	708.579
1990-10-01	747.791
1991-01-01	699.983
1991-04-01	680.422
1991-07-01	734.707
1991-10-01	761.331
1992-01-01	727.694
1992-04-01	785.286
1992-07-01	731.436
1992-10-01	656.209
1993-01-01	654.782
1993-04-01	668.232
1993-07-01	684.161
1993-10-01	697.295
1994-01-01	693.337
1994-04-01	691.679
1994-07-01	710.700
1994-10-01	709.831
1995-01-01	740.178
1995-04-01	740.608
1995-07-01	743.418
1995-10-01	774.086
1996-01-01	761.495
1996-04-01	804.967
1996-07-01	817.951
1996-10-01	908.807
1997-01-01	875.797
1997-04-01	931.674
1997-07-01	942.013
1997-10-01	965.287
1998-01-01	1006.618
1998-04-01	1027.090
1998-07-01	1100.185
1998-10-01	1095.852
1999-01-01	1114.769
1999-04-01	1131.701
1999-07-01	1199.872
1999-10-01	1213.802
2000-01-01	1245.060
2000-04-01	1240.949
2000-07-01	1250.242
2000-10-01	1295.135
2001-01-01	1302.432
2001-04-01	1297.788
2001-07-01	1365.800
2001-10-01	1373.056
2002-01-01	1366.148
2002-04-01	1495.892
2002-07-01	1598.690
2002-10-01	1644.819
2003-01-01	1580.768
2003-04-01	1699.810
2003-07-01	1732.307
2003-10-01	1854.073
2004-01-01	1890.657
2004-04-01	1873.701
2004-07-01	1914.730
2004-10-01	2083.648
2005-01-01	2085.425
2005-04-01	2097.297
2005-07-01	2148.146
2005-10-01	2157.679
2006-01-01	2232.764
2006-04-01	2425.733
2006-07-01	2544.353
2006-10-01	2676.966
2007-01-01	2654.028
2007-04-01	2745.444
2007-07-01	2892.489
2007-10-01	2922.284
2008-01-01	3010.183
2008-04-01	3000.507
2008-07-01	2745.853
2008-10-01	2350.538
2009-01-01	2251.021
2009-04-01	2464.377
2009-07-01	2449.477
2009-10-01	2440.819
2010-01-01	2327.409
2010-04-01	2271.030
2010-07-01	2435.574
2010-10-01	2331.926
2011-01-01	2435.778
2011-04-01	2430.626
2011-07-01	2359.400
2011-10-01	2325.362
2012-01-01	2480.903
2012-04-01	2455.537
2012-07-01	2582.168
2012-10-01	2550.254
2013-01-01	2354.584
2013-04-01	2439.149
2013-07-01	2535.867
2013-10-01	2560.012
2014-01-01	2527.804
2014-04-01	2551.871
2014-07-01	2419.699
2014-10-01	2316.101
2015-01-01	2241.533
2015-04-01	2291.607
2015-07-01	2229.416
2015-10-01	2200.992
2016-01-01	2182.989
2016-04-01	2128.727
2016-07-01	2131.994
2016-10-01	2004.430
2017-01-01	2025.504
2017-04-01	2126.324
2017-07-01	2257.954
2017-10-01	2291.167
2018-01-01	2423.590