Quarter	Percent
1978-04-01	24.2090128221959
1978-07-01	25.3873605237148
1978-10-01	23.7787403190330
1979-01-01	21.1394422591721
1979-04-01	23.6986996680222
1979-07-01	24.3723068574064
1979-10-01	22.8098950553779
1980-01-01	20.6733120562800
1980-04-01	22.3807968338622
1980-07-01	23.0126240803129
1980-10-01	21.5943390984403
1981-01-01	19.1731507766434
1981-04-01	21.4648824940851
1981-07-01	22.6131098714844
1981-10-01	21.8850883174730
1982-01-01	19.7829793532710
1982-04-01	22.6883346595785
1982-07-01	23.3143949926889
1982-10-01	22.0524224582875
1983-01-01	20.8241683636317
1983-04-01	23.9247366619114
1983-07-01	24.9344045479598
1983-10-01	23.8211562186093
1984-01-01	22.2463063269140
1984-04-01	24.5738434192147
1984-07-01	25.0956721839837
1984-10-01	24.9759846734519
1985-01-01	22.6165189601693
1985-04-01	24.6750949147823
1985-07-01	25.4153250321285
1985-10-01	24.9690779125919
1986-01-01	22.1378561863805
1986-04-01	24.0391796692810
1986-07-01	25.4482123512419
1986-10-01	24.6276818451285
1987-01-01	23.2694776438867
1987-04-01	25.5719791126715
1987-07-01	26.1921766973860
1987-10-01	25.6600978506040
1988-01-01	23.4672637638882
1988-04-01	25.7206962302993
1988-07-01	26.6087064974382
1988-10-01	25.5716526341523
1989-01-01	23.2411112477602
1989-04-01	25.3161360403236
1989-07-01	25.1652015990906
1989-10-01	24.6745701074595
1990-01-01	23.5540490529498
1990-04-01	25.2224753200644
1990-07-01	25.6412453443191
1990-10-01	24.4897288136419
1991-01-01	24.8652527926497
1991-04-01	27.6725633661638
1991-07-01	29.4140034226583
1991-10-01	27.8299655457779
1992-01-01	26.1037664133562
1992-04-01	28.4377546502448
1992-07-01	28.4581334324091
1992-10-01	28.1512143987665
1993-01-01	26.1592760711942
1993-04-01	29.5783128463573
1993-07-01	29.7143649454231
1993-10-01	27.9506030222577
1994-01-01	25.2137624719678
1994-04-01	28.4323156097096
1994-07-01	28.2587134573676
1994-10-01	26.3297798481618
1995-01-01	24.8668641936233
1995-04-01	26.9625005844120
1995-07-01	27.1623681738257
1995-10-01	26.3499174508392
1996-01-01	24.7184818247988
1996-04-01	27.0315061101496
1996-07-01	27.1491505996297
1996-10-01	25.9660419785208
1997-01-01	24.9162194154778
1997-04-01	27.9833426273107
1997-07-01	29.5730220714369
1997-10-01	27.4133747160355
1998-01-01	26.0797382962182
1998-04-01	28.6728301870879
1998-07-01	28.9732167273063
1998-10-01	27.9971432883375
1999-01-01	27.1792362371112
1999-04-01	29.0088058536927
1999-07-01	28.8128459440217
1999-10-01	27.6848405401653
2000-01-01	26.6526511496467
2000-04-01	28.7216180360507
2000-07-01	28.9902866352321
2000-10-01	28.1803157108248
2001-01-01	27.1274579055756
2001-04-01	28.4581410029209
2001-07-01	28.0429100320919
2001-10-01	27.4319309323878
2002-01-01	26.5535126983678
2002-04-01	29.4050315185241
2002-07-01	29.1836114645912
2002-10-01	28.1357498415038
2003-01-01	26.8723030736747
2003-04-01	29.6658305898655
2003-07-01	30.0191069891199
2003-10-01	27.8309769337221
2004-01-01	27.1082554784630
2004-04-01	29.3681755074350
2004-07-01	30.3616701540278
2004-10-01	28.4575283311266
2005-01-01	26.6574950761530
2005-04-01	28.0833567316912
2005-07-01	28.9641229009097
2005-10-01	28.2274681322981
2006-01-01	26.5762778619993
2006-04-01	28.6147109124009
2006-07-01	28.8509049811365
2006-10-01	27.6682779816177
2007-01-01	26.9804038568081
2007-04-01	28.8399817276139
2007-07-01	29.6685405299956
2007-10-01	27.3472948188622
2008-01-01	25.9675386583528
2008-04-01	28.1158358163468
2008-07-01	29.4957525184682
2008-10-01	28.5191765378510
2009-01-01	27.4137262709128
2009-04-01	29.6182356040797
2009-07-01	31.2854319484053
2009-10-01	30.0262706423290
2010-01-01	28.7346768649657
2010-04-01	30.8335323578757
2010-07-01	32.0662429819062
2010-10-01	29.9337400156727
2011-01-01	29.4051237313657
2011-04-01	32.0729162674792
2011-07-01	32.1493078340316
2011-10-01	31.2133656723493
2012-01-01	30.4121923407200
2012-04-01	32.3092501534483
2012-07-01	33.0035687864744
2012-10-01	31.3517791942209
2013-01-01	30.7180249487035
2013-04-01	32.6466682365614
2013-07-01	33.8624083836837
2013-10-01	33.2974134823587
2014-01-01	32.3002767551127
2014-04-01	33.8584685589158
2014-07-01	34.3723423741964
2014-10-01	31.9033983351217
2015-01-01	30.4418583853757
2015-04-01	32.6618046395768
2015-07-01	33.8125026574445
2015-10-01	31.7937519659426
2016-01-01	31.0896199369813
2016-04-01	33.0208023756816
2016-07-01	33.8507194191706
2016-10-01	33.2406537227267
2017-01-01	31.5375824283162
2017-04-01	32.9598059325659
2017-07-01	33.3519205944791
2017-10-01	32.5991164810106
2018-01-01	30.6839180125453
2018-04-01	32.0245286449872
2018-07-01	33.0043008399755