Quarter	Millions of US Dollars
1962-10-01	5
1963-01-01	5
1963-04-01	5
1963-07-01	5
1963-10-01	5
1964-01-01	5
1964-04-01	5
1964-07-01	5
1964-10-01	5
1965-01-01	5
1965-04-01	5
1965-07-01	5
1965-10-01	5
1966-01-01	85
1966-04-01	130
1966-07-01	160
1966-10-01	180
1967-01-01	220
1967-04-01	350
1967-07-01	370
1967-10-01	392
1968-01-01	690
1968-04-01	1185
1968-07-01	1395
1968-10-01	1486
1969-01-01	1713
1969-04-01	1747
1969-07-01	1777
1969-10-01	1934
1970-01-01	2002
1970-04-01	2018
1970-07-01	2293
1970-10-01	2328
1971-01-01	3310
1971-04-01	3831
1971-07-01	4137
1971-10-01	4994
1972-01-01	7986
1972-04-01	10511
1972-07-01	12831
1972-10-01	15782
1973-01-01	19178
1973-04-01	22576
1973-07-01	24054
1973-10-01	25389
1974-01-01	27602
1974-04-01	29702
1974-07-01	31276
1974-10-01	36111
1975-01-01	41052
1975-04-01	46341
1975-07-01	48223
1975-10-01	55875
1976-01-01	65872
1976-04-01	73354
1976-07-01	82066
1976-10-01	90876
1977-01-01	97881
1977-04-01	107460
1977-07-01	117176
1977-10-01	131562
1978-01-01	144558
1978-04-01	153642
1978-07-01	171266
1978-10-01	179199
1979-01-01	184842
1979-04-01	194486
1979-07-01	208217
1979-10-01	213149
1980-01-01	205271
1980-04-01	227914
1980-07-01	231768
1980-10-01	231691
1981-01-01	230192
1981-04-01	227545
1981-07-01	238709
1981-10-01	259911
1982-01-01	266940
1982-04-01	274222
1982-07-01	285752
1982-10-01	308953
1983-01-01	320374
1983-04-01	331337
1983-07-01	337643
1983-10-01	351672
1984-01-01	376328
1984-04-01	379821
1984-07-01	389540
1984-10-01	412870
1985-01-01	438775
1985-04-01	465051
1985-07-01	515864
1985-10-01	547687
1986-01-01	615058
1986-04-01	674808
1986-07-01	738155
1986-10-01	775090
1987-01-01	845406
1987-04-01	875881
1987-07-01	909569
1987-10-01	996082
1988-01-01	1009307
1988-04-01	1005131
1988-07-01	1034575
1988-10-01	1093193
1989-01-01	1107646
1989-04-01	1127725
1989-07-01	1186976
1989-10-01	1245628
1990-01-01	1315189
1990-04-01	1363075
1990-07-01	1468225
1990-10-01	1536346
1991-01-01	1520478
1991-04-01	1539936
1991-07-01	1636851
1991-10-01	1743421
1992-01-01	1721716
1992-04-01	1827316
1992-07-01	1894135
1992-10-01	1822303
1993-01-01	1862209
1993-04-01	1923928
1993-07-01	1999630
1993-10-01	2018242
1994-01-01	2142067
1994-04-01	2268311
1994-07-01	2375548
1994-10-01	2414253
1995-01-01	2601858
1995-04-01	2672243
1995-07-01	2672101
1995-10-01	2715465
1996-01-01	2780011
1996-04-01	2866012
1996-07-01	2957515
1996-10-01	3078972
1997-01-01	3108790
1997-04-01	3259573
1997-07-01	3356580
1997-10-01	3356159
1998-01-01	3473263
1998-04-01	3641323
1998-07-01	3850915
1998-10-01	3966466
1999-01-01	4047811
1999-04-01	4239128
1999-07-01	4604466
1999-10-01	4672893
2000-01-01	4794891
2000-04-01	5006245
2000-07-01	5100334
2000-10-01	5444738
2001-01-01	5639265
2001-04-01	5853295
2001-07-01	6202092
2001-10-01	6349829
2002-01-01	6550800
2002-04-01	7250327
2002-07-01	7337537
2002-10-01	7685839
2003-01-01	8067969
2003-04-01	8538968
2003-07-01	8907174
2003-10-01	9687064
2004-01-01	9946206
2004-04-01	10146402
2004-07-01	10535592
2004-10-01	11491223
2005-01-01	11547084
2005-04-01	11464787
2005-07-01	11612524
2005-10-01	11913748
2006-01-01	12578770
2006-04-01	13465578
2006-07-01	13925005
2006-10-01	15047136
2007-01-01	15914049
2007-04-01	17015462
2007-07-01	17803105
2007-10-01	18433798
2008-01-01	19518657
2008-04-01	20261839
2008-07-01	19177435
2008-10-01	18883711
2009-01-01	18650840
2009-04-01	20148559
2009-07-01	20895868
2009-10-01	20880586
2010-01-01	20407548
2010-04-01	19445296
2010-07-01	21008455
2010-10-01	20850616
2011-01-01	21826292
2011-04-01	22217865
2011-07-01	21371342
2011-10-01	20986454
2012-01-01	21852661
2012-04-01	21103694
2012-07-01	21602274
2012-10-01	21959842
2013-01-01	21470363
2013-04-01	21702361
2013-07-01	22303913
2013-10-01	22734707
2014-01-01	22807558
2014-04-01	23076562
2014-07-01	22254418
2014-10-01	21790248
2015-01-01	20817668
2015-04-01	21524753
2015-07-01	21433075
2015-10-01	21086546
2016-01-01	21702276
2016-04-01	21650800
2016-07-01	21873541
2016-10-01	21288904
2017-01-01	21808858
2017-04-01	22773668
2017-07-01	23480312
2017-10-01	23885073
2018-01-01	24556716
2018-04-01	24080664