Quarter	Billions of US Dollars
1970-10-01	95.974
1971-01-01	98.254
1971-04-01	105.206
1971-07-01	114.807
1971-10-01	121.552
1972-01-01	128.292
1972-04-01	133.319
1972-07-01	134.711
1972-10-01	140.892
1973-01-01	163.593
1973-04-01	197.218
1973-07-01	202.701
1973-10-01	186.339
1974-01-01	203.544
1974-04-01	205.264
1974-07-01	203.522
1974-10-01	229.881
1975-01-01	237.997
1975-04-01	240.453
1975-07-01	215.358
1975-10-01	225.411
1976-01-01	234.021
1976-04-01	235.841
1976-07-01	253.798
1976-10-01	268.734
1977-01-01	267.297
1977-04-01	279.202
1977-07-01	287.166
1977-10-01	323.593
1978-01-01	336.645
1978-04-01	334.241
1978-07-01	363.717
1978-10-01	397.665
1979-01-01	390.670
1979-04-01	404.968
1979-07-01	435.607
1979-10-01	450.299
1980-01-01	405.924
1980-04-01	461.234
1980-07-01	455.790
1980-10-01	438.101
1981-01-01	415.936
1981-04-01	372.061
1981-07-01	389.455
1981-10-01	411.487
1982-01-01	384.837
1982-04-01	383.355
1982-07-01	378.258
1982-10-01	410.948
1983-01-01	398.739
1983-04-01	385.659
1983-07-01	376.544
1983-10-01	370.249
1984-01-01	389.820
1984-04-01	368.056
1984-07-01	342.847
1984-10-01	335.122
1985-01-01	342.800
1985-04-01	346.723
1985-07-01	395.579
1985-10-01	437.895
1986-01-01	463.949
1986-04-01	495.172
1986-07-01	536.944
1986-10-01	567.827
1987-01-01	608.730
1987-04-01	605.459
1987-07-01	610.979
1987-10-01	719.422
1988-01-01	689.833
1988-04-01	638.879
1988-07-01	626.141
1988-10-01	678.955
1989-01-01	641.755
1989-04-01	633.954
1989-07-01	673.882
1989-10-01	763.968
1990-01-01	777.119
1990-04-01	794.946
1990-07-01	866.974
1990-10-01	931.880
1991-01-01	843.395
1991-04-01	825.023
1991-07-01	935.550
1991-10-01	1047.449
1992-01-01	993.201
1992-04-01	1094.481
1992-07-01	1207.220
1992-10-01	1051.601
1993-01-01	1085.137
1993-04-01	1063.078
1993-07-01	1129.695
1993-10-01	1081.379
1994-01-01	1088.307
1994-04-01	1152.857
1994-07-01	1207.451
1994-10-01	1221.216
1995-01-01	1295.483
1995-04-01	1326.245
1995-07-01	1300.405
1995-10-01	1291.356
1996-01-01	1272.737
1996-04-01	1253.343
1996-07-01	1256.927
1996-10-01	1245.071
1997-01-01	1167.274
1997-04-01	1136.072
1997-07-01	1126.705
1997-10-01	1125.022
1998-01-01	1107.694
1998-04-01	1142.303
1998-07-01	1255.254
1998-10-01	1278.459
1999-01-01	1113.363
1999-04-01	1084.127
1999-07-01	1147.719
1999-10-01	1127.421
2000-01-01	1076.835
2000-04-01	1108.539
2000-07-01	1023.877
2000-10-01	1138.927
2001-01-01	1103.218
2001-04-01	1073.727
2001-07-01	1164.035
2001-10-01	1141.178
2002-01-01	1138.315
2002-04-01	1322.716
2002-07-01	1324.613
2002-10-01	1399.358
2003-01-01	1473.614
2003-04-01	1559.917
2003-07-01	1574.504
2003-10-01	1710.272
2004-01-01	1633.578
2004-04-01	1611.591
2004-07-01	1621.714
2004-10-01	1776.325
2005-01-01	1684.625
2005-04-01	1576.428
2005-07-01	1565.243
2005-10-01	1520.836
2006-01-01	1590.058
2006-04-01	1701.706
2006-07-01	1713.197
2006-10-01	1767.566
2007-01-01	1805.070
2007-04-01	1840.470
2007-07-01	1938.757
2007-10-01	2071.381
2008-01-01	2226.290
2008-04-01	2240.322
2008-07-01	2056.709
2008-10-01	2030.814
2009-01-01	1952.815
2009-04-01	2066.752
2009-07-01	2109.086
2009-10-01	2065.190
2010-01-01	1940.639
2010-04-01	1776.267
2010-07-01	1971.035
2010-10-01	1903.286
2011-01-01	1950.475
2011-04-01	1993.895
2011-07-01	1894.363
2011-10-01	1839.504
2012-01-01	1909.693
2012-04-01	1824.520
2012-07-01	1903.518
2012-10-01	1934.759
2013-01-01	1916.195
2013-04-01	1992.263
2013-07-01	2075.785
2013-10-01	2140.057
2014-01-01	2156.724
2014-04-01	2167.513
2014-07-01	1973.380
2014-10-01	1874.916
2015-01-01	1714.093
2015-04-01	1800.732
2015-07-01	1806.666
2015-10-01	1748.984
2016-01-01	1875.676
2016-04-01	1831.049
2016-07-01	1863.942
2016-10-01	1752.971
2017-01-01	1835.891
2017-04-01	1966.485
2017-07-01	2079.754
2017-10-01	2137.797
2018-01-01	2204.719