Quarter	Billions of US Dollars
1970-10-01	77.239
1971-01-01	78.387
1971-04-01	83.813
1971-07-01	91.557
1971-10-01	97.523
1972-01-01	102.762
1972-04-01	107.352
1972-07-01	108.492
1972-10-01	114.773
1973-01-01	134.198
1973-04-01	162.934
1973-07-01	168.118
1973-10-01	155.547
1974-01-01	167.866
1974-04-01	168.074
1974-07-01	165.089
1974-10-01	185.152
1975-01-01	190.608
1975-04-01	192.502
1975-07-01	172.056
1975-10-01	181.704
1976-01-01	188.523
1976-04-01	191.696
1976-07-01	207.483
1976-10-01	222.190
1977-01-01	221.074
1977-04-01	232.962
1977-07-01	240.835
1977-10-01	274.519
1978-01-01	286.977
1978-04-01	289.123
1978-07-01	318.655
1978-10-01	354.500
1979-01-01	351.541
1979-04-01	370.347
1979-07-01	402.894
1979-10-01	422.959
1980-01-01	379.780
1980-04-01	432.268
1980-07-01	426.337
1980-10-01	412.181
1981-01-01	391.837
1981-04-01	351.612
1981-07-01	368.577
1981-10-01	390.844
1982-01-01	365.651
1982-04-01	366.065
1982-07-01	362.731
1982-10-01	396.552
1983-01-01	387.689
1983-04-01	380.302
1983-07-01	376.122
1983-10-01	375.331
1984-01-01	396.476
1984-04-01	376.752
1984-07-01	353.100
1984-10-01	347.573
1985-01-01	359.619
1985-04-01	368.377
1985-07-01	424.990
1985-10-01	477.068
1986-01-01	507.270
1986-04-01	544.369
1986-07-01	592.788
1986-10-01	630.140
1987-01-01	674.804
1987-04-01	671.434
1987-07-01	678.368
1987-10-01	799.463
1988-01-01	761.849
1988-04-01	702.356
1988-07-01	684.926
1988-10-01	740.180
1989-01-01	696.243
1989-04-01	685.538
1989-07-01	726.093
1989-10-01	821.764
1990-01-01	834.607
1990-04-01	850.922
1990-07-01	927.047
1990-10-01	996.722
1991-01-01	860.666
1991-04-01	829.796
1991-07-01	925.857
1991-10-01	1049.970
1992-01-01	983.894
1992-04-01	1082.205
1992-07-01	1196.941
1992-10-01	1068.030
1993-01-01	1081.350
1993-04-01	1056.258
1993-07-01	1125.274
1993-10-01	1093.292
1994-01-01	1150.576
1994-04-01	1231.741
1994-07-01	1300.368
1994-10-01	1343.240
1995-01-01	1512.017
1995-04-01	1537.044
1995-07-01	1522.176
1995-10-01	1552.511
1996-01-01	1518.667
1996-04-01	1493.107
1996-07-01	1513.924
1996-10-01	1530.686
1997-01-01	1422.213
1997-04-01	1391.990
1997-07-01	1392.624
1997-10-01	1397.459
1998-01-01	1360.405
1998-04-01	1410.566
1998-07-01	1538.777
1998-10-01	1579.517
1999-01-01	1482.222
1999-04-01	1459.743
1999-07-01	1527.235
1999-10-01	1460.093
2000-01-01	1392.542
2000-04-01	1410.044
2000-07-01	1303.424
2000-10-01	1396.612
2001-01-01	1325.255
2001-04-01	1277.071
2001-07-01	1385.071
2001-10-01	1341.650
2002-01-01	1323.821
2002-04-01	1518.141
2002-07-01	1508.049
2002-10-01	1613.224
2003-01-01	1671.905
2003-04-01	1761.438
2003-07-01	1806.310
2003-10-01	1962.833
2004-01-01	1886.051
2004-04-01	1881.697
2004-07-01	1931.339
2004-10-01	2121.651
2005-01-01	2001.605
2005-04-01	1873.857
2005-07-01	1871.185
2005-10-01	1834.116
2006-01-01	1881.636
2006-04-01	1978.726
2006-07-01	1976.554
2006-10-01	2050.230
2007-01-01	2060.839
2007-04-01	2087.232
2007-07-01	2186.590
2007-10-01	2261.951
2008-01-01	2412.437
2008-04-01	2406.516
2008-07-01	2181.818
2008-10-01	2117.449
2009-01-01	2013.632
2009-04-01	2144.206
2009-07-01	2226.988
2009-10-01	2186.690
2010-01-01	2037.975
2010-04-01	1862.383
2010-07-01	2078.178
2010-10-01	2035.098
2011-01-01	2158.297
2011-04-01	2202.539
2011-07-01	2072.803
2011-10-01	1990.712
2012-01-01	2052.555
2012-04-01	1942.698
2012-07-01	2002.984
2012-10-01	2049.380
2013-01-01	1984.372
2013-04-01	2034.565
2013-07-01	2111.191
2013-10-01	2157.708
2014-01-01	2158.096
2014-04-01	2145.836
2014-07-01	1989.022
2014-10-01	1925.992
2015-01-01	1708.789
2015-04-01	1789.325
2015-07-01	1807.804
2015-10-01	1766.127
2016-01-01	1854.093
2016-04-01	1825.505
2016-07-01	1853.379
2016-10-01	1760.694
2017-01-01	1794.453
2017-04-01	1935.861
2017-07-01	2024.894
2017-10-01	2072.600
2018-01-01	2138.674