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	115
1966-07-01	130
1966-10-01	130
1967-01-01	145
1967-04-01	250
1967-07-01	250
1967-10-01	272
1968-01-01	570
1968-04-01	1065
1968-07-01	1235
1968-10-01	1326
1969-01-01	1553
1969-04-01	1587
1969-07-01	1617
1969-10-01	1774
1970-01-01	1801
1970-04-01	1817
1970-07-01	1892
1970-10-01	1927
1971-01-01	2749
1971-04-01	3059
1971-07-01	3308
1971-10-01	3933
1972-01-01	5522
1972-04-01	7561
1972-07-01	9138
1972-10-01	11145
1973-01-01	13430
1973-04-01	15426
1973-07-01	16410
1973-10-01	17261
1974-01-01	18635
1974-04-01	19802
1974-07-01	21073
1974-10-01	24222
1975-01-01	27910
1975-04-01	31970
1975-07-01	33484
1975-10-01	38722
1976-01-01	46212
1976-04-01	51659
1976-07-01	56896
1976-10-01	63607
1977-01-01	68738
1977-04-01	75559
1977-07-01	81416
1977-10-01	91247
1978-01-01	99841
1978-04-01	106616
1978-07-01	117324
1978-10-01	122132
1979-01-01	127703
1979-04-01	134686
1979-07-01	144093
1979-10-01	147666
1980-01-01	143096
1980-04-01	158766
1980-07-01	161641
1980-10-01	162572
1981-01-01	162363
1981-04-01	161432
1981-07-01	169950
1981-10-01	185335
1982-01-01	193640
1982-04-01	201200
1982-07-01	210922
1982-10-01	227980
1983-01-01	238556
1983-04-01	246428
1983-07-01	250381
1983-10-01	262236
1984-01-01	282526
1984-04-01	287383
1984-07-01	298073
1984-10-01	318110
1985-01-01	339414
1985-04-01	360203
1985-07-01	398969
1985-10-01	425987
1986-01-01	462098
1986-04-01	512739
1986-07-01	562954
1986-10-01	595620
1987-01-01	678307
1987-04-01	709406
1987-07-01	740513
1987-10-01	806021
1988-01-01	819395
1988-04-01	826203
1988-07-01	857654
1988-10-01	904641
1989-01-01	922683
1989-04-01	945613
1989-07-01	994947
1989-10-01	1043677
1990-01-01	1073839
1990-04-01	1110471
1990-07-01	1200001
1990-10-01	1238326
1991-01-01	1229209
1991-04-01	1243811
1991-07-01	1320607
1991-10-01	1398392
1992-01-01	1374578
1992-04-01	1456155
1992-07-01	1506688
1992-10-01	1447913
1993-01-01	1469456
1993-04-01	1499832
1993-07-01	1547039
1993-10-01	1545671
1994-01-01	1639652
1994-04-01	1706855
1994-07-01	1790953
1994-10-01	1813311
1995-01-01	1971093
1995-04-01	2028740
1995-07-01	2026150
1995-10-01	2062059
1996-01-01	2112502
1996-04-01	2176356
1996-07-01	2243687
1996-10-01	2334330
1997-01-01	2349225
1997-04-01	2453748
1997-07-01	2523456
1997-10-01	2524427
1998-01-01	2611722
1998-04-01	2740134
1998-07-01	2916845
1998-10-01	3031355
1999-01-01	3110463
1999-04-01	3287193
1999-07-01	3622295
1999-10-01	3687963
2000-01-01	3793094
2000-04-01	3996402
2000-07-01	4067412
2000-10-01	4395567
2001-01-01	4593894
2001-04-01	4802966
2001-07-01	5115717
2001-10-01	5272741
2002-01-01	5458178
2002-04-01	6100088
2002-07-01	6177177
2002-10-01	6494471
2003-01-01	6851275
2003-04-01	7276872
2003-07-01	7610306
2003-10-01	8334452
2004-01-01	8565739
2004-04-01	8749799
2004-07-01	9107351
2004-10-01	9981782
2005-01-01	10025723
2005-04-01	9962771
2005-07-01	10072052
2005-10-01	10347574
2006-01-01	10954110
2006-04-01	11802377
2006-07-01	12231700
2006-10-01	13251666
2007-01-01	14046889
2007-04-01	15044198
2007-07-01	15779568
2007-10-01	16350112
2008-01-01	17364053
2008-04-01	18058581
2008-07-01	17031874
2008-10-01	16804179
2009-01-01	16593071
2009-04-01	17921726
2009-07-01	18559112
2009-10-01	18491179
2010-01-01	17978001
2010-04-01	17008084
2010-07-01	18394111
2010-10-01	18164857
2011-01-01	18974582
2011-04-01	19233378
2011-07-01	18373907
2011-10-01	17939727
2012-01-01	18475057
2012-04-01	17671924
2012-07-01	17979410
2012-10-01	18177079
2013-01-01	17649270
2013-04-01	17718043
2013-07-01	18166956
2013-10-01	18447857
2014-01-01	18380591
2014-04-01	18512387
2014-07-01	17700139
2014-10-01	17222948
2015-01-01	16312846
2015-04-01	16865574
2015-07-01	16787923
2015-10-01	16451934
2016-01-01	16926163
2016-04-01	16752221
2016-07-01	16894075
2016-10-01	16284373
2017-01-01	16602198
2017-04-01	17345154
2017-07-01	17847750
2017-10-01	18091128
2018-01-01	18552581
2018-04-01	18105786