Quarter	Millions of US Dollars
1957-10-01	335
1958-10-01	351
1959-10-01	333
1960-01-01	271
1960-04-01	252
1960-07-01	265
1960-10-01	252
1961-01-01	197
1961-04-01	196
1961-07-01	266
1961-10-01	293
1962-01-01	245
1962-04-01	229
1962-07-01	309
1962-10-01	300
1963-01-01	297
1963-04-01	296
1963-07-01	267
1963-10-01	271
1964-01-01	229
1964-04-01	249
1964-07-01	201
1964-10-01	200
1965-01-01	262
1965-04-01	203
1965-07-01	156
1965-10-01	284
1966-01-01	250
1966-04-01	322
1966-07-01	447
1966-10-01	359
1967-01-01	189
1967-04-01	223
1967-07-01	293
1967-10-01	265
1968-01-01	196
1968-04-01	247
1968-07-01	274
1968-10-01	255
1969-01-01	173
1969-04-01	189
1969-07-01	156
1969-10-01	203
1970-01-01	114
1970-04-01	145
1970-07-01	152
1970-10-01	106
1971-01-01	110
1971-04-01	109
1971-07-01	122
1971-10-01	100
1972-01-01	89
1972-04-01	138
1972-07-01	186
1972-10-01	153
1973-01-01	235
1973-04-01	416
1973-07-01	483
1973-10-01	415
1974-01-01	512
1974-04-01	458
1974-07-01	410
1974-10-01	560
1975-01-01	637
1975-04-01	724
1975-07-01	700
1975-10-01	838
1976-01-01	804
1976-04-01	962
1976-07-01	840
1976-10-01	898
1977-01-01	834
1977-04-01	766
1977-07-01	898
1977-10-01	898
1978-01-01	829
1978-04-01	896
1978-07-01	900
1978-10-01	787
1979-01-01	772
1979-04-01	831
1979-07-01	788
1979-10-01	1473
1980-01-01	799
1980-04-01	1473
1980-07-01	1460
1980-10-01	1693
1981-01-01	494
1981-04-01	706
1981-07-01	607
1981-10-01	749
1982-01-01	663
1982-04-01	825
1982-07-01	735
1982-10-01	801
1983-01-01	713
1983-04-01	1152
1983-07-01	752
1983-10-01	354
1984-01-01	348
1984-04-01	1318
1984-07-01	648
1984-10-01	534
1985-01-01	451
1985-04-01	883
1985-07-01	242
1985-10-01	285
1986-01-01	342
1986-04-01	586
1986-07-01	622
1986-10-01	547
1987-01-01	377
1987-04-01	854
1987-07-01	446
1987-10-01	389
1988-01-01	100
1988-04-01	195
1988-07-01	108
1988-10-01	35
1989-01-01	103
1989-04-01	758
1989-07-01	917
1989-10-01	642
1990-01-01	451
1990-04-01	235
1990-07-01	883
1990-10-01	1263
1991-01-01	745
1991-04-01	1589
1991-07-01	1140
1991-10-01	939
1992-01-01	1136
1992-04-01	1789
1992-07-01	2846
1992-10-01	2645
1993-01-01	1615
1993-04-01	1681
1993-07-01	2083
1993-10-01	2226
1994-01-01	1888
1994-04-01	2087
1994-07-01	2094
1994-10-01	2104
1995-01-01	1953
1995-04-01	1875
1995-07-01	2137
1995-10-01	2139
1996-01-01	2688
1996-04-01	2884
1996-07-01	2912
1996-10-01	2793
1997-01-01	3233
1997-04-01	3544
1997-07-01	3886
1997-10-01	3677
1998-01-01	3434
1998-04-01	3066
1998-07-01	3539
1998-10-01	3254
1999-01-01	3069
1999-04-01	3266
1999-07-01	3261
1999-10-01	3296
2000-01-01	3343
2000-04-01	4235
2000-07-01	4042
2000-10-01	3860
2001-01-01	3187
2001-04-01	3474
2001-07-01	3020
2001-10-01	1829
2002-01-01	1572
2002-04-01	2110
2002-07-01	1724
2002-10-01	2118
2003-01-01	2782
2003-04-01	2414
2003-07-01	2892
2003-10-01	3746
2004-01-01	4494
2004-04-01	4548
2004-07-01	4791
2004-10-01	6018
2005-01-01	5520
2005-04-01	5868
2005-07-01	6063
2005-10-01	6109
2006-01-01	6514
2006-04-01	5716
2006-07-01	5359
2006-10-01	5938
2007-01-01	6288
2007-04-01	6863
2007-07-01	7259
2007-10-01	7346
2008-01-01	6399
2008-04-01	7760
2008-07-01	7325
2008-10-01	6679
2009-01-01	6858
2009-04-01	11804
2009-07-01	13013
2009-10-01	14443
2010-01-01	15689
2010-04-01	16324
2010-07-01	19116
2010-10-01	20814
2011-01-01	20364
2011-04-01	21138
2011-07-01	18831
2011-10-01	19954
2012-01-01	20345
2012-04-01	19748
2012-07-01	19336
2012-10-01	18782
2013-01-01	18632
2013-04-01	18208
2013-07-01	18838
2013-10-01	17738
2014-01-01	18167
2014-04-01	19140
2014-07-01	18609
2014-10-01	19043
2015-01-01	16567
2015-04-01	16291
2015-07-01	14785
2015-10-01	13283
2016-01-01	14206
2016-04-01	14665
2016-07-01	16346
2016-10-01	18108
2017-01-01	18766
2017-04-01	19692
2017-07-01	21111
2017-10-01	24700
2018-01-01	24755