Quarter	Millions of US Dollars
1962-10-01	0
1963-01-01	0
1963-04-01	0
1963-07-01	0
1963-10-01	0
1964-01-01	0
1964-04-01	0
1964-07-01	0
1964-10-01	0
1965-01-01	0
1965-04-01	0
1965-07-01	0
1965-10-01	0
1966-01-01	0
1966-04-01	0
1966-07-01	0
1966-10-01	0
1967-01-01	0
1967-04-01	0
1967-07-01	0
1967-10-01	0
1968-01-01	0
1968-04-01	0
1968-07-01	0
1968-10-01	0
1969-01-01	0
1969-04-01	0
1969-07-01	0
1969-10-01	0
1970-01-01	0
1970-04-01	0
1970-07-01	0
1970-10-01	0
1971-01-01	0
1971-04-01	0
1971-07-01	0
1971-10-01	0
1972-01-01	0
1972-04-01	0
1972-07-01	0
1972-10-01	0
1973-01-01	0
1973-04-01	0
1973-07-01	0
1973-10-01	0
1974-01-01	0
1974-04-01	0
1974-07-01	0
1974-10-01	0
1975-01-01	0
1975-04-01	0
1975-07-01	0
1975-10-01	0
1976-01-01	0
1976-04-01	32
1976-07-01	33
1976-10-01	33
1977-01-01	31
1977-04-01	0
1977-07-01	0
1977-10-01	37
1978-01-01	93
1978-04-01	132
1978-07-01	295
1978-10-01	483
1979-01-01	621
1979-04-01	869
1979-07-01	1330
1979-10-01	1757
1980-01-01	1821
1980-04-01	2111
1980-07-01	1904
1980-10-01	2058
1981-01-01	2855
1981-04-01	3294
1981-07-01	3510
1981-10-01	3906
1982-01-01	4020
1982-04-01	4853
1982-07-01	5483
1982-10-01	5527
1983-01-01	4609
1983-04-01	4010
1983-07-01	3750
1983-10-01	3685
1984-01-01	5945
1984-04-01	4883
1984-07-01	5118
1984-10-01	8876
1985-01-01	8717
1985-04-01	9812
1985-07-01	10714
1985-10-01	10747
1986-01-01	10967
1986-04-01	13346
1986-07-01	14840
1986-10-01	12694
1987-01-01	13561
1987-04-01	13525
1987-07-01	13013
1987-10-01	19117
1988-01-01	20397
1988-04-01	19923
1988-07-01	19718
1988-10-01	17447
1989-01-01	14996
1989-04-01	14861
1989-07-01	14398
1989-10-01	14542
1990-01-01	15759
1990-04-01	14168
1990-07-01	15905
1990-10-01	19962
1991-01-01	20579
1991-04-01	21897
1991-07-01	23458
1991-10-01	19008
1992-01-01	16058
1992-04-01	19048
1992-07-01	20349
1992-10-01	20643
1993-01-01	22273
1993-04-01	21013
1993-07-01	35492
1993-10-01	33403
1994-01-01	33580
1994-04-01	30217
1994-07-01	29837
1994-10-01	36433
1995-01-01	43262
1995-04-01	47607
1995-07-01	51801
1995-10-01	51021
1996-01-01	49870
1996-04-01	48751
1996-07-01	45978
1996-10-01	63512
1997-01-01	62798
1997-04-01	66273
1997-07-01	65241
1997-10-01	53147
1998-01-01	56232
1998-04-01	54320
1998-07-01	62983
1998-10-01	62704
1999-01-01	54022
1999-04-01	56113
1999-07-01	49331
1999-10-01	46886
2000-01-01	54413
2000-04-01	58697
2000-07-01	54593
2000-10-01	56985
2001-01-01	47996
2001-04-01	51765
2001-07-01	51571
2001-10-01	53510
2002-01-01	62513
2002-04-01	59774
2002-07-01	58865
2002-10-01	62312
2003-01-01	58918
2003-04-01	61534
2003-07-01	58663
2003-10-01	53564
2004-01-01	58110
2004-04-01	59937
2004-07-01	61359
2004-10-01	58687
2005-01-01	70669
2005-04-01	65912
2005-07-01	73502
2005-10-01	79893
2006-01-01	75925
2006-04-01	83572
2006-07-01	71014
2006-10-01	57504
2007-01-01	76993
2007-04-01	111421
2007-07-01	146855
2007-10-01	120928
2008-01-01	134588
2008-04-01	138194
2008-07-01	109917
2008-10-01	123840
2009-01-01	117610
2009-04-01	127119
2009-07-01	122219
2009-10-01	102657
2010-01-01	113524
2010-04-01	99889
2010-07-01	135430
2010-10-01	118536
2011-01-01	156258
2011-04-01	160054
2011-07-01	166420
2011-10-01	166371
2012-01-01	132597
2012-04-01	127801
2012-07-01	113704
2012-10-01	140524
2013-01-01	134451
2013-04-01	118327
2013-07-01	133266
2013-10-01	125376
2014-01-01	141703
2014-04-01	153595
2014-07-01	142052
2014-10-01	141766
2015-01-01	115379
2015-04-01	117222
2015-07-01	141805
2015-10-01	127268
2016-01-01	129251
2016-04-01	118786
2016-07-01	112704
2016-10-01	122140
2017-01-01	130539
2017-04-01	129457
2017-07-01	121523
2017-10-01	105849
2018-01-01	95564
2018-04-01	112678