Quarter	Percent
1960-01-01	48.6157860470146
1960-04-01	55.5724498607111
1960-07-01	56.0098200835387
1960-10-01	54.6812767372727
1961-01-01	49.8124031117895
1961-04-01	55.4691441893140
1961-07-01	54.8385417621462
1961-10-01	54.1244283301535
1962-01-01	48.7347495737388
1962-04-01	54.7896328925228
1962-07-01	54.2751737200910
1962-10-01	52.6544577607880
1963-01-01	47.3116395883907
1963-04-01	53.4269441787158
1963-07-01	53.0559154483348
1963-10-01	51.4753730030608
1964-01-01	47.2354769153254
1964-04-01	52.8526557175479
1964-07-01	51.8107385941970
1964-10-01	50.0709370315026
1965-01-01	46.4987671213415
1965-04-01	51.8452826079788
1965-07-01	51.6246827878646
1965-10-01	50.0156852226129
1966-01-01	46.6861081664780
1966-04-01	52.1795857880618
1966-07-01	51.7552258061529
1966-10-01	50.0751164983338
1967-01-01	46.8136394522670
1967-04-01	53.1019473899292
1967-07-01	51.7329560474654
1967-10-01	50.1254970320006
1968-01-01	46.6939188092999
1968-04-01	52.3913600819742
1968-07-01	51.6174223124719
1968-10-01	49.8116527765068
1969-01-01	46.6062736051357
1969-04-01	51.5719670710029
1969-07-01	51.0809814344862
1969-10-01	49.1349012454194
1970-01-01	46.5966662162529
1970-04-01	51.3410768096820
1970-07-01	50.8374154502316
1970-10-01	48.7118853360630
1971-01-01	46.2955465662112
1971-04-01	49.9101522005330
1971-07-01	49.3353279453848
1971-10-01	47.6415042454613
1972-01-01	45.0693842169282
1972-04-01	48.0884458187952
1972-07-01	48.0585523897222
1972-10-01	47.6225345041460
1973-01-01	46.2106137185254
1973-04-01	48.4391969321379
1973-07-01	48.4403965563480
1973-10-01	47.9976889910332
1974-01-01	44.4978755171873
1974-04-01	47.5611671205849
1974-07-01	46.7269294697672
1974-10-01	45.5141923417955
1975-01-01	42.7861147683949
1975-04-01	46.4562132692592
1975-07-01	46.4440905214181
1975-10-01	44.7301706086127
1976-01-01	42.9596230498011
1976-04-01	45.9657015622675
1976-07-01	46.4711685976726
1976-10-01	45.2315505524505
1977-01-01	43.2935158311155
1977-04-01	47.2753888684776
1977-07-01	47.1853304331269
1977-10-01	46.0552214066374
1978-01-01	44.0134159375277
1978-04-01	47.9152076888705
1978-07-01	47.4790173923893
1978-10-01	46.7068583450364
1979-01-01	44.6735924108720
1979-04-01	47.8639276178904
1979-07-01	47.8463272581682
1979-10-01	46.7753220798989
1980-01-01	44.5368457100868
1980-04-01	47.9502900666191
1980-07-01	48.1704062574372
1980-10-01	46.5451765730789
1981-01-01	44.3871909694557
1981-04-01	47.8193856886975
1981-07-01	47.7331064317706
1981-10-01	47.2148764684191
1982-01-01	45.2123964396077
1982-04-01	48.0529132138726
1982-07-01	47.6506618014874
1982-10-01	47.4538902801002
1983-01-01	46.0072497252979
1983-04-01	48.9126392399128
1983-07-01	48.7117858161429
1983-10-01	47.7957048075178
1984-01-01	45.4376186838866
1984-04-01	48.7395742163730
1984-07-01	48.7577672679216
1984-10-01	47.8909598149301
1985-01-01	46.0178789116157
1985-04-01	48.6574130163248
1985-07-01	48.5033619083597
1985-10-01	47.2522858575600
1986-01-01	45.8745533992208
1986-04-01	48.4819891821422
1986-07-01	48.2997190928471
1986-10-01	47.2926990902840
1987-01-01	45.5116407123904
1987-04-01	48.4772402196619
1987-07-01	48.2590756182151
1987-10-01	47.6657388898576
1988-01-01	46.0717878806681
1988-04-01	48.8596418764172
1988-07-01	48.6318889992075
1988-10-01	47.7343197898971
1989-01-01	46.5063837868618
1989-04-01	49.6094801017187
1989-07-01	49.3772085360473
1989-10-01	48.6335114590919
1990-01-01	47.5795828210808
1990-04-01	50.1097054743462
1990-07-01	49.9163172338926
1990-10-01	49.1628581852050
1991-01-01	48.1014557583459
1991-04-01	50.6238650601183
1991-07-01	50.4087364010388
1991-10-01	49.8182854798028
1992-01-01	48.3075049072202
1992-04-01	50.6489602165734
1992-07-01	50.0852471703019
1992-10-01	49.7759621866079
1993-01-01	47.5378132404280
1993-04-01	49.9746254459915
1993-07-01	49.6214884324211
1993-10-01	49.1009223362442
1994-01-01	47.4440749125473
1994-04-01	49.9655989950297
1994-07-01	49.0996745199419
1994-10-01	48.5030162162843
1995-01-01	47.3169384596365
1995-04-01	49.3880090368690
1995-07-01	48.9659669459470
1995-10-01	47.9953700798844
1996-01-01	46.9081400321282
1996-04-01	49.2010595355694
1996-07-01	49.1843742052881
1996-10-01	48.2121159784548
1997-01-01	47.3728891293194
1997-04-01	49.4057969455109
1997-07-01	49.3978295809430
1997-10-01	48.4880366632907
1998-01-01	47.4966848870912
1998-04-01	48.9926483110437
1998-07-01	48.5808819189286
1998-10-01	47.6240294450686
1999-01-01	46.3297786328400
1999-04-01	48.2697830075822
1999-07-01	47.9692670997191
1999-10-01	47.2651210542116
2000-01-01	45.9778610998309
2000-04-01	47.7356932704584
2000-07-01	47.5739559057692
2000-10-01	47.2879044229394
2001-01-01	46.3440983351721
2001-04-01	47.4064110159257
2001-07-01	46.9555829208286
2001-10-01	46.8178430771642
2002-01-01	45.3590731248355
2002-04-01	46.4006989956914
2002-07-01	46.3715137507175
2002-10-01	46.1836555224384
2003-01-01	45.0034559720244
2003-04-01	46.4789066852558
2003-07-01	46.4568664361747
2003-10-01	45.9842136528252
2004-01-01	45.2567528337634
2004-04-01	46.5253035495022
2004-07-01	46.8306882848532
2004-10-01	46.0329882026334
2005-01-01	45.3392038483896
2005-04-01	46.9639962726053
2005-07-01	46.9777289938623
2005-10-01	46.1921018160905
2006-01-01	45.6335660632665
2006-04-01	46.9135491442762
2006-07-01	47.0708631268756
2006-10-01	46.8461329567092
2007-01-01	45.5862264878676
2007-04-01	47.3435035074530
2007-07-01	46.8958149704871
2007-10-01	46.8516871069824
2008-01-01	45.7448902857698
2008-04-01	47.2445061781948
2008-07-01	46.7140023927112
2008-10-01	46.4908922541857
2009-01-01	45.7222806699228
2009-04-01	46.5685645161425
2009-07-01	46.5082587411012
2009-10-01	46.0278439774447
2010-01-01	45.6251363239148
2010-04-01	46.4244517576612
2010-07-01	46.5730271772458
2010-10-01	46.3791787277962
2011-01-01	45.7649989074651
2011-04-01	46.2772852307138
2011-07-01	46.2730262711370
2011-10-01	46.3532208500029
2012-01-01	45.5684531847031
2012-04-01	46.4488930871772
2012-07-01	46.4849157415887
2012-10-01	46.5027157876527
2013-01-01	46.3807163589872
2013-04-01	47.1438643907250
2013-07-01	47.2519640012167
2013-10-01	47.7320219109561
2014-01-01	46.8624976504856
2014-04-01	47.7417451856948
2014-07-01	47.8296130632640
2014-10-01	48.1777975770197
2015-01-01	47.4454212635114
2015-04-01	48.2036835260821
2015-07-01	48.4093122972556
2015-10-01	48.4362838510829
2016-01-01	48.2291727592131
2016-04-01	48.8154866914785
2016-07-01	49.4659124704982
2016-10-01	49.2512188651532
2017-01-01	48.7978901616046
2017-04-01	49.8692341967924
2017-07-01	50.3366902453383
2017-10-01	50.2322597329763
2018-01-01	50.6249907092002
2018-04-01	51.4877129188851
2018-07-01	51.7119025525373