Quarter	Billions of US Dollars
1970-01-01	25.939
1970-04-01	26.769
1970-07-01	27.488
1970-10-01	28.976
1971-01-01	29.730
1971-04-01	30.850
1971-07-01	32.233
1971-10-01	35.526
1972-01-01	37.381
1972-04-01	40.111
1972-07-01	42.212
1972-10-01	45.209
1973-01-01	51.694
1973-04-01	55.056
1973-07-01	59.527
1973-10-01	63.936
1974-01-01	64.130
1974-04-01	69.796
1974-07-01	73.576
1974-10-01	80.792
1975-01-01	84.736
1975-04-01	89.133
1975-07-01	87.410
1975-10-01	92.972
1976-01-01	85.736
1976-04-01	89.670
1976-07-01	94.115
1976-10-01	99.632
1977-01-01	103.548
1977-04-01	107.113
1977-07-01	91.328
1977-10-01	100.873
1978-01-01	104.907
1978-04-01	110.804
1978-07-01	124.216
1978-10-01	133.620
1979-01-01	141.906
1979-04-01	151.907
1979-07-01	157.234
1979-10-01	163.887
1980-01-01	156.128
1980-04-01	167.454
1980-07-01	164.803
1980-10-01	161.517
1981-01-01	154.568
1981-04-01	144.275
1981-07-01	148.627
1981-10-01	157.037
1982-01-01	146.966
1982-04-01	147.177
1982-07-01	148.546
1982-10-01	141.796
1983-01-01	134.014
1983-04-01	130.251
1983-07-01	126.820
1983-10-01	128.369
1984-01-01	135.179
1984-04-01	131.484
1984-07-01	122.456
1984-10-01	126.253
1985-01-01	125.590
1985-04-01	127.158
1985-07-01	135.876
1985-10-01	150.565
1986-01-01	156.720
1986-04-01	168.327
1986-07-01	177.954
1986-10-01	188.556
1987-01-01	195.348
1987-04-01	201.093
1987-07-01	211.049
1987-10-01	252.556
1988-01-01	248.004
1988-04-01	234.402
1988-07-01	237.698
1988-10-01	278.570
1989-01-01	273.825
1989-04-01	277.366
1989-07-01	296.419
1989-10-01	336.329
1990-01-01	346.866
1990-04-01	382.540
1990-07-01	410.652
1990-10-01	431.515
1991-01-01	401.851
1991-04-01	389.774
1991-07-01	429.654
1991-10-01	480.714
1992-01-01	447.851
1992-04-01	495.959
1992-07-01	493.395
1992-10-01	439.725
1993-01-01	435.069
1993-04-01	396.515
1993-07-01	392.223
1993-10-01	368.792
1994-01-01	382.732
1994-04-01	399.874
1994-07-01	410.270
1994-10-01	403.799
1995-01-01	466.468
1995-04-01	496.523
1995-07-01	489.457
1995-10-01	504.198
1996-01-01	492.694
1996-04-01	488.198
1996-07-01	490.408
1996-10-01	494.081
1997-01-01	462.630
1997-04-01	459.992
1997-07-01	464.592
1997-10-01	471.343
1998-01-01	468.059
1998-04-01	504.161
1998-07-01	554.315
1998-10-01	576.998
1999-01-01	563.847
1999-04-01	589.184
1999-07-01	626.933
1999-10-01	617.649
2000-01-01	622.104
2000-04-01	662.147
2000-07-01	643.370
2000-10-01	712.559
2001-01-01	694.781
2001-04-01	698.564
2001-07-01	785.940
2001-10-01	786.422
2002-01-01	805.527
2002-04-01	947.841
2002-07-01	956.284
2002-10-01	1054.404
2003-01-01	1121.098
2003-04-01	1213.929
2003-07-01	1268.929
2003-10-01	1442.170
2004-01-01	1440.842
2004-04-01	1500.625
2004-07-01	1574.725
2004-10-01	1805.951
2005-01-01	1785.073
2005-04-01	1757.206
2005-07-01	1805.478
2005-10-01	1865.354
2006-01-01	2025.442
2006-04-01	2243.118
2006-07-01	2329.959
2006-10-01	2557.922
2007-01-01	2678.273
2007-04-01	2853.472
2007-07-01	3071.204
2007-10-01	3273.726
2008-01-01	3551.621
2008-04-01	3627.755
2008-07-01	3325.150
2008-10-01	3255.825
2009-01-01	3118.416
2009-04-01	3314.852
2009-07-01	3416.711
2009-10-01	3334.840
2010-01-01	3126.668
2010-04-01	2882.980
2010-07-01	3189.585
2010-10-01	3119.429
2011-01-01	3288.731
2011-04-01	3354.268
2011-07-01	3118.405
2011-10-01	2967.547
2012-01-01	3055.969
2012-04-01	2856.704
2012-07-01	2890.207
2012-10-01	2837.736
2013-01-01	2698.370
2013-04-01	2718.183
2013-07-01	2765.577
2013-10-01	2791.161
2014-01-01	2745.642
2014-04-01	2713.435
2014-07-01	2480.883
2014-10-01	2351.168
2015-01-01	2091.164
2015-04-01	2151.855
2015-07-01	2132.275
2015-10-01	2058.004
2016-01-01	2128.750
2016-04-01	2092.785
2016-07-01	2094.454
2016-10-01	1964.657
2017-01-01	2002.553
2017-04-01	2138.367
2017-07-01	2194.867
2017-10-01	2207.189
2018-01-01	2259.763