Quarter	Millions of US Dollars
1952-01-01	9946
1952-04-01	10379
1952-07-01	10534
1952-10-01	10610
1953-01-01	11104
1953-04-01	11773
1953-07-01	12482
1953-10-01	13241
1954-01-01	13913
1954-04-01	14386
1954-07-01	14703
1954-10-01	14259
1955-01-01	14540
1955-04-01	14923
1955-07-01	15180
1955-10-01	15332
1956-01-01	16514
1956-04-01	17115
1956-07-01	17533
1956-10-01	17364
1957-01-01	19031
1957-04-01	19617
1957-07-01	20556
1957-10-01	21038
1958-01-01	24093
1958-04-01	24806
1958-07-01	23927
1958-10-01	23332
1959-01-01	23929
1959-04-01	24868
1959-07-01	25092
1959-10-01	25444
1960-01-01	27883
1960-04-01	29657
1960-07-01	31346
1960-10-01	34706
1961-01-01	35948
1961-04-01	37518
1961-07-01	38886
1961-10-01	39104
1962-01-01	42511
1962-04-01	43383
1962-07-01	43524
1962-10-01	45086
1963-01-01	47483
1963-04-01	49197
1963-07-01	50203
1963-10-01	53487
1964-01-01	57021
1964-04-01	59324
1964-07-01	60885
1964-10-01	63899
1965-01-01	67532
1965-04-01	70716
1965-07-01	72509
1965-10-01	74357
1966-01-01	78858
1966-04-01	82498
1966-07-01	84610
1966-10-01	87512
1967-01-01	92370
1967-04-01	92086
1967-07-01	92896
1967-10-01	97251
1968-01-01	101197
1968-04-01	101509
1968-07-01	105316
1968-10-01	111325
1969-01-01	110230
1969-04-01	112336
1969-07-01	112806
1969-10-01	118400
1970-01-01	126985
1970-04-01	134231
1970-07-01	146552
1970-10-01	155287
1971-01-01	160690
1971-04-01	161828
1971-07-01	170481
1971-10-01	180180
1972-01-01	184847
1972-04-01	194553
1972-07-01	203322
1972-10-01	215668
1973-01-01	233374
1973-04-01	249487
1973-07-01	279159
1973-10-01	287005
1974-01-01	298793
1974-04-01	326505
1974-07-01	354699
1974-10-01	369168
1975-01-01	372685
1975-04-01	365045
1975-07-01	365631
1975-10-01	380047
1976-01-01	373948
1976-04-01	379436
1976-07-01	381732
1976-10-01	394152
1977-01-01	401925
1977-04-01	418517
1977-07-01	434889
1977-10-01	470983
1978-01-01	494148
1978-04-01	521401
1978-07-01	542207
1978-10-01	583959
1979-01-01	606258
1979-04-01	623192
1979-07-01	657832
1979-10-01	695695
1980-01-01	725889
1980-04-01	739038
1980-07-01	763368
1980-10-01	821921
1981-01-01	838710
1981-04-01	884130
1981-07-01	937929
1981-10-01	990430
1982-01-01	1028162
1982-04-01	1091998
1982-07-01	1129211
1982-10-01	1147517
1983-01-01	1111604
1983-04-01	1156520
1983-07-01	1212431
1983-10-01	1257905
1984-01-01	1299672
1984-04-01	1376296
1984-07-01	1443449
1984-10-01	1518283
1985-01-01	1563800
1985-04-01	1595682
1985-07-01	1658110
1985-10-01	1716001
1986-01-01	1773382
1986-04-01	1835891
1986-07-01	1931486
1986-10-01	2041403
1987-01-01	2115199
1987-04-01	2226328
1987-07-01	2318642
1987-10-01	2401477
1988-01-01	2436424
1988-04-01	2506408
1988-07-01	2592143
1988-10-01	2690622
1989-01-01	2810820
1989-04-01	2857398
1989-07-01	2895034
1989-10-01	2970877
1990-01-01	2988946
1990-04-01	3019443
1990-07-01	3058117
1990-10-01	3140344
1991-01-01	3161234
1991-04-01	3158793
1991-07-01	3205215
1991-10-01	3252824
1992-01-01	3280843
1992-04-01	3326110
1992-07-01	3385846
1992-10-01	3433698
1993-01-01	3456498
1993-04-01	3496763
1993-07-01	3595386
1993-10-01	3704051
1994-01-01	3831188
1994-04-01	3934210
1994-07-01	4056317
1994-10-01	4199908
1995-01-01	4307819
1995-04-01	4434144
1995-07-01	4561722
1995-10-01	4697562
1996-01-01	4792143
1996-04-01	4968417
1996-07-01	5107257
1996-10-01	5276278
1997-01-01	5361065
1997-04-01	5541696
1997-07-01	5675339
1997-10-01	5888243
1998-01-01	6106215
1998-04-01	6325262
1998-07-01	6543738
1998-10-01	6806239
1999-01-01	7067324
1999-04-01	7303660
1999-07-01	7555780
1999-10-01	7872021
2000-01-01	8036882
2000-04-01	8253146
2000-07-01	8481725
2000-10-01	8777194
2001-01-01	9085070
2001-04-01	9220536
2001-07-01	9481122
2001-10-01	9748747
2002-01-01	10008886
2002-04-01	10191463
2002-07-01	10376936
2002-10-01	10642330
2003-01-01	10953785
2003-04-01	11161795
2003-07-01	11416466
2003-10-01	11578908
2004-01-01	11861140
2004-04-01	12098321
2004-07-01	12388146
2004-10-01	12706890
2005-01-01	13028635
2005-04-01	13394569
2005-07-01	13563292
2005-10-01	14018959
2006-01-01	14434322
2006-04-01	14872947
2006-07-01	15218422
2006-10-01	15598509
2007-01-01	16173151
2007-04-01	16590395
2007-07-01	17161823
2007-10-01	17604852
2008-01-01	17826695
2008-04-01	18059892
2008-07-01	17964096
2008-10-01	17804345
2009-01-01	17908874
2009-04-01	17544877
2009-07-01	17148348
2009-10-01	16870656
2010-01-01	16048036
2010-04-01	15725371
2010-07-01	15641284
2010-10-01	15662439
2011-01-01	15640925
2011-04-01	15528913
2011-07-01	15237838
2011-10-01	15124474
2012-01-01	14948946
2012-04-01	14772888
2012-07-01	14838881
2012-10-01	14782425
2013-01-01	14740374
2013-04-01	14703845
2013-07-01	14733146
2013-10-01	14894012
2014-01-01	14846978
2014-04-01	14933624
2014-07-01	14991639
2014-10-01	15230254
2015-01-01	15106551
2015-04-01	15164601
2015-07-01	15219972
2015-10-01	15059143
2016-01-01	15158595
2016-04-01	15202023
2016-07-01	15205533
2016-10-01	15220291
2017-01-01	15312844
2017-04-01	15431160
2017-07-01	15551614
2017-10-01	15576580
2018-01-01	15644616