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	5
1966-04-01	5
1966-07-01	5
1966-10-01	5
1967-01-01	5
1967-04-01	5
1967-07-01	5
1967-10-01	5
1968-01-01	5
1968-04-01	10
1968-07-01	10
1968-10-01	10
1969-01-01	10
1969-04-01	10
1969-07-01	10
1969-10-01	10
1970-01-01	10
1970-04-01	10
1970-07-01	10
1970-10-01	10
1971-01-01	20
1971-04-01	20
1971-07-01	20
1971-10-01	20
1972-01-01	35
1972-04-01	41
1972-07-01	41
1972-10-01	51
1973-01-01	53
1973-04-01	54
1973-07-01	58
1973-10-01	71
1974-01-01	72
1974-04-01	82
1974-07-01	81
1974-10-01	99
1975-01-01	101
1975-04-01	99
1975-07-01	100
1975-10-01	115
1976-01-01	131
1976-04-01	129
1976-07-01	143
1976-10-01	153
1977-01-01	193
1977-04-01	210
1977-07-01	222
1977-10-01	252
1978-01-01	280
1978-04-01	281
1978-07-01	301
1978-10-01	305
1979-01-01	308
1979-04-01	309
1979-07-01	318
1979-10-01	316
1980-01-01	297
1980-04-01	317
1980-07-01	315
1980-10-01	316
1981-01-01	336
1981-04-01	320
1981-07-01	320
1981-10-01	321
1982-01-01	321
1982-04-01	361
1982-07-01	342
1982-10-01	342
1983-01-01	390
1983-04-01	409
1983-07-01	406
1983-10-01	418
1984-01-01	436
1984-04-01	408
1984-07-01	392
1984-10-01	379
1985-01-01	384
1985-04-01	403
1985-07-01	592
1985-10-01	720
1986-01-01	788
1986-04-01	905
1986-07-01	1052
1986-10-01	1112
1987-01-01	1383
1987-04-01	1456
1987-07-01	1528
1987-10-01	1694
1988-01-01	1721
1988-04-01	1782
1988-07-01	1710
1988-10-01	1815
1989-01-01	2015
1989-04-01	2038
1989-07-01	2105
1989-10-01	2331
1990-01-01	2310
1990-04-01	2558
1990-07-01	2622
1990-10-01	2847
1991-01-01	2615
1991-04-01	2638
1991-07-01	2790
1991-10-01	2967
1992-01-01	3195
1992-04-01	3414
1992-07-01	3719
1992-10-01	3295
1993-01-01	3475
1993-04-01	3583
1993-07-01	4229
1993-10-01	4278
1994-01-01	4565
1994-04-01	4508
1994-07-01	4783
1994-10-01	4730
1995-01-01	5309
1995-04-01	5358
1995-07-01	5197
1995-10-01	5069
1996-01-01	5079
1996-04-01	5361
1996-07-01	5418
1996-10-01	5109
1997-01-01	4638
1997-04-01	4731
1997-07-01	4747
1997-10-01	4663
1998-01-01	4572
1998-04-01	5012
1998-07-01	5075
1998-10-01	5848
1999-01-01	6002
1999-04-01	6270
1999-07-01	6798
1999-10-01	6854
2000-01-01	7298
2000-04-01	7816
2000-07-01	7730
2000-10-01	8620
2001-01-01	9647
2001-04-01	9656
2001-07-01	9885
2001-10-01	10197
2002-01-01	9720
2002-04-01	11363
2002-07-01	11195
2002-10-01	11845
2003-01-01	12402
2003-04-01	13554
2003-07-01	14613
2003-10-01	17322
2004-01-01	18600
2004-04-01	19905
2004-07-01	24460
2004-10-01	29526
2005-01-01	32641
2005-04-01	35234
2005-07-01	38551
2005-10-01	42979
2006-01-01	45365
2006-04-01	47573
2006-07-01	49826
2006-10-01	57784
2007-01-01	62011
2007-04-01	63501
2007-07-01	64860
2007-10-01	67139
2008-01-01	70087
2008-04-01	70026
2008-07-01	63140
2008-10-01	58319
2009-01-01	53330
2009-04-01	53227
2009-07-01	54677
2009-10-01	51188
2010-01-01	47268
2010-04-01	44997
2010-07-01	45007
2010-10-01	41513
2011-01-01	42199
2011-04-01	43186
2011-07-01	39459
2011-10-01	34941
2012-01-01	32657
2012-04-01	30539
2012-07-01	26959
2012-10-01	24891
2013-01-01	22216
2013-04-01	20804
2013-07-01	21034
2013-10-01	21079
2014-01-01	20961
2014-04-01	20547
2014-07-01	20539
2014-10-01	19732
2015-01-01	18475
2015-04-01	17713
2015-07-01	15897
2015-10-01	16106
2016-01-01	16581
2016-04-01	13967
2016-07-01	14657
2016-10-01	13487
2017-01-01	13956
2017-04-01	15038
2017-07-01	15279
2017-10-01	15945
2018-01-01	16220
2018-04-01	15451