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	8
1975-07-01	8
1975-10-01	50
1976-01-01	91
1976-04-01	137
1976-07-01	261
1976-10-01	306
1977-01-01	446
1977-04-01	432
1977-07-01	388
1977-10-01	532
1978-01-01	620
1978-04-01	992
1978-07-01	1795
1978-10-01	2875
1979-01-01	3662
1979-04-01	4672
1979-07-01	5554
1979-10-01	6251
1980-01-01	6340
1980-04-01	7794
1980-07-01	7974
1980-10-01	8724
1981-01-01	9720
1981-04-01	9916
1981-07-01	10451
1981-10-01	10892
1982-01-01	11425
1982-04-01	12572
1982-07-01	13372
1982-10-01	14133
1983-01-01	14411
1983-04-01	14934
1983-07-01	15225
1983-10-01	15245
1984-01-01	18736
1984-04-01	19117
1984-07-01	22835
1984-10-01	38915
1985-01-01	42260
1985-04-01	47569
1985-07-01	52099
1985-10-01	48463
1986-01-01	50112
1986-04-01	53635
1986-07-01	57453
1986-10-01	57076
1987-01-01	61716
1987-04-01	60458
1987-07-01	60487
1987-10-01	69140
1988-01-01	68397
1988-04-01	70593
1988-07-01	74944
1988-10-01	78176
1989-01-01	79156
1989-04-01	82935
1989-07-01	85800
1989-10-01	91815
1990-01-01	100080
1990-04-01	106298
1990-07-01	116166
1990-10-01	131705
1991-01-01	142567
1991-04-01	154083
1991-07-01	175835
1991-10-01	179792
1992-01-01	190176
1992-04-01	229712
1992-07-01	254630
1992-10-01	257137
1993-01-01	248814
1993-04-01	218530
1993-07-01	303668
1993-10-01	289465
1994-01-01	287456
1994-04-01	288263
1994-07-01	300356
1994-10-01	304019
1995-01-01	339912
1995-04-01	369282
1995-07-01	378162
1995-10-01	395928
1996-01-01	403481
1996-04-01	416522
1996-07-01	360819
1996-10-01	461299
1997-01-01	465621
1997-04-01	482999
1997-07-01	491314
1997-10-01	488292
1998-01-01	506230
1998-04-01	498068
1998-07-01	531007
1998-10-01	558408
1999-01-01	568966
1999-04-01	601821
1999-07-01	695133
1999-10-01	718418
2000-01-01	759716
2000-04-01	823438
2000-07-01	818419
2000-10-01	911300
2001-01-01	930034
2001-04-01	916066
2001-07-01	965987
2001-10-01	986639
2002-01-01	1065561
2002-04-01	1199722
2002-07-01	1225199
2002-10-01	1271985
2003-01-01	1359237
2003-04-01	1459412
2003-07-01	1487557
2003-10-01	1632175
2004-01-01	1649576
2004-04-01	1643788
2004-07-01	1735612
2004-10-01	1871330
2005-01-01	1894700
2005-04-01	1881399
2005-07-01	1904591
2005-10-01	1966294
2006-01-01	2085028
2006-04-01	2172085
2006-07-01	2217558
2006-10-01	2260563
2007-01-01	2424253
2007-04-01	2593956
2007-07-01	2716854
2007-10-01	2868472
2008-01-01	3217950
2008-04-01	3301008
2008-07-01	3066589
2008-10-01	2832914
2009-01-01	2693709
2009-04-01	2863563
2009-07-01	2993905
2009-10-01	2894672
2010-01-01	2913993
2010-04-01	2774457
2010-07-01	2965295
2010-10-01	2906186
2011-01-01	3171882
2011-04-01	3225357
2011-07-01	3153277
2011-10-01	3071792
2012-01-01	3107003
2012-04-01	2934676
2012-07-01	2922682
2012-10-01	2935243
2013-01-01	2925046
2013-04-01	2948607
2013-07-01	3040541
2013-10-01	3082940
2014-01-01	2991286
2014-04-01	2918808
2014-07-01	2813687
2014-10-01	2726640
2015-01-01	2543554
2015-04-01	2618144
2015-07-01	2611873
2015-10-01	2525013
2016-01-01	2762021
2016-04-01	2742785
2016-07-01	2768961
2016-10-01	2638967
2017-01-01	2533918
2017-04-01	2534161
2017-07-01	2470784
2017-10-01	2449115
2018-01-01	2509956
2018-04-01	2428202