Quarter	Percent
1986-01-01	50.7065948855989
1986-04-01	49.7308209959623
1986-07-01	49.5453014482991
1986-10-01	51.0279743849006
1987-01-01	51.2656091798852
1987-04-01	52.4002704530088
1987-07-01	51.8267929634641
1987-10-01	52.3358158429248
1988-01-01	51.7451711284310
1988-04-01	53.4465195246180
1988-07-01	54.6444368832936
1988-10-01	54.7375596455351
1989-01-01	56.1283714578354
1989-04-01	55.8974358974359
1989-07-01	56.8345323741007
1989-10-01	57.0154373927959
1990-01-01	56.5292096219931
1990-04-01	55.9421288322425
1990-07-01	56.2456866804693
1990-10-01	56.5653075328265
1991-01-01	56.5894154271878
1991-04-01	55.9363101419176
1991-07-01	55.9944559944560
1991-10-01	55.9639389736477
1992-01-01	55.6210964607911
1992-04-01	55.6751128080528
1992-07-01	55.6751128080528
1992-10-01	55.2047189451770
1993-01-01	54.5423023578363
1993-04-01	52.5841137703781
1993-07-01	52.1497919556172
1993-10-01	52.2837370242214
1994-01-01	51.6919889502762
1994-04-01	51.0351966873706
1994-07-01	50.6198347107438
1994-10-01	48.6625514403292
1995-01-01	48.7529894089511
1995-04-01	48.6035422343324
1995-07-01	48.1707317073171
1995-10-01	46.8013468013468
1996-01-01	45.1591289782245
1996-04-01	44.1294196130754
1996-07-01	44.0689198144466
1996-10-01	43.9842209072978
1997-01-01	43.0714052820346
1997-04-01	42.9449838187702
1997-07-01	43.4223222901254
1997-10-01	44.0997761432683
1998-01-01	42.9980903882877
1998-04-01	41.8700475435816
1998-07-01	41.5433070866142
1998-10-01	41.1617738913179
1999-01-01	39.4793926247288
1999-04-01	40.2769230769231
1999-07-01	40.1589242053790
1999-10-01	41.6439187139824
2000-01-01	42.1907914535059
2000-04-01	41.4852371011035
2000-07-01	39.2973132565692
2000-10-01	38.4435342305442
2001-01-01	38.1849811539577
2001-04-01	38.1870503597122
2001-07-01	36.7027334851936
2001-10-01	36.4861072130227
2002-01-01	35.7399723374827
2002-04-01	34.1256830601093
2002-07-01	34.2602591792657
2002-10-01	34.4616204690832
2003-01-01	34.5444971037388
2003-04-01	32.9947916666667
2003-07-01	33.3333333333333
2003-10-01	32.1874204227145
2004-01-01	33.1401209677419
2004-04-01	31.3030454318522
2004-07-01	30.4724214692060
2004-10-01	30.0735294117647
2005-01-01	29.6844660194175
2005-04-01	29.9060919817000
2005-07-01	28.7320574162679
2005-10-01	28.2727488714659
2006-01-01	28.3187927375619
2006-04-01	27.4835988753515
2006-07-01	29.0705800139762
2006-10-01	29.1859389454209
2007-01-01	27.1766597748679
2007-04-01	26.5417999086341
2007-07-01	27.5635208711434
2007-10-01	27.3095077545516
2008-01-01	26.9813000890472
2008-04-01	26.9655477031802
2008-07-01	26.9197016235191
2008-10-01	26.8074912891986
2009-01-01	26.1827608554763
2009-04-01	25.7614757614758
2009-07-01	25.9156729131175
2009-10-01	24.8944256756757
2010-01-01	25.1833228577415
2010-04-01	23.9116850656113
2010-07-01	24.0057995028998
2010-10-01	24.2393092105263
2011-01-01	24.3469387755102
2011-04-01	24.4777935510039
2011-07-01	24.1476699616704
2011-10-01	23.3025311370028
2012-01-01	22.9921890646906
2012-04-01	23.0385306448393
2012-07-01	22.9116945107399
2012-10-01	24.1632006337889
2013-01-01	23.4760307753008
2013-04-01	22.2680817610063
2013-07-01	22.9068857589984
2013-10-01	22.7537922987164
2014-01-01	21.2918197640688
2014-04-01	21.6496827533167
2014-07-01	22.0416746320015
2014-10-01	20.9616115545420
2015-01-01	21.4096749811036
2015-04-01	22.0135236664162
2015-07-01	22.7713539723984
2015-10-01	22.5555555555556
2016-01-01	22.3938223938224
2016-04-01	20.6021897810219
2016-07-01	21.2604128938790
2016-10-01	21.4272874348373
2017-01-01	19.5217701641684
2017-04-01	20.0354295837024
2017-07-01	19.3945793734600
2017-10-01	19.1150752011193
2018-01-01	19.6388261851016
2018-04-01	19.5618423322408
2018-07-01	19.8320191978060