Quarter	Percent
1986-01-01	15.8912188728702
1986-04-01	19.5379537953795
1986-07-01	21.4760638297872
1986-10-01	19.8465643762508
1987-01-01	18.6287625418060
1987-04-01	21.5053763440860
1987-07-01	22.1734728315896
1987-10-01	19.9255751014885
1988-01-01	22.0638153428377
1988-04-01	25.0000000000000
1988-07-01	26.8636207488835
1988-10-01	24.6721877156660
1989-01-01	23.2477446217904
1989-04-01	27.5837988826816
1989-07-01	28.7118287118287
1989-10-01	25.3253605346465
1990-01-01	27.2887323943662
1990-04-01	27.5971731448763
1990-07-01	29.2449485997873
1990-10-01	25.8064516129032
1991-01-01	26.8344558667139
1991-04-01	29.9396949272792
1991-07-01	30.7746979388770
1991-10-01	26.8396729470316
1992-01-01	27.3373622467117
1992-04-01	31.5546069014586
1992-07-01	33.1669044222539
1992-10-01	29.4138670478914
1993-01-01	29.4812164579606
1993-04-01	31.9713261648746
1993-07-01	33.9928057553957
1993-10-01	29.4520547945206
1994-01-01	29.0974729241877
1994-04-01	31.9956616052061
1994-07-01	30.7246376811594
1994-10-01	28.0943738656987
1995-01-01	28.1147838721395
1995-04-01	30.6070519810978
1995-07-01	30.4949053857351
1995-10-01	25.9191845649800
1996-01-01	28.5142024763292
1996-04-01	31.0382513661202
1996-07-01	30.0584368151936
1996-10-01	28.1581838154522
1997-01-01	29.5671313279530
1997-04-01	31.5053367684947
1997-07-01	32.2866642039158
1997-10-01	27.9836916234248
1998-01-01	28.7360594795539
1998-04-01	32.8976848394324
1998-07-01	34.2203898050975
1998-10-01	32.6438510718315
1999-01-01	32.2641509433962
1999-04-01	35.7196969696970
1999-07-01	34.3193022373910
1999-10-01	31.0554290053151
2000-01-01	31.5229775921003
2000-04-01	37.5379939209726
2000-07-01	36.5742499050513
2000-10-01	31.0841546626232
2001-01-01	32.5510976532930
2001-04-01	36.1100640784018
2001-07-01	35.1685393258427
2001-10-01	31.4752879970271
2002-01-01	30.0699300699301
2002-04-01	35.5790240349599
2002-07-01	35.3896103896104
2002-10-01	31.9871336669049
2003-01-01	33.1331684916990
2003-04-01	36.6783216783217
2003-07-01	36.1709520500348
2003-10-01	32.8956461644782
2004-01-01	33.7113402061856
2004-04-01	35.6825179609990
2004-07-01	36.4597544338336
2004-10-01	31.5431679129844
2005-01-01	32.6786318997630
2005-04-01	35.4827819041188
2005-07-01	36.3636363636364
2005-10-01	33.4227287965136
2006-01-01	30.6639973306640
2006-04-01	34.0644732469259
2006-07-01	35.3116710875332
2006-10-01	30.7157057654076
2007-01-01	31.3472360145647
2007-04-01	35.5202120609675
2007-07-01	33.6873547958845
2007-10-01	31.4968469963492
2008-01-01	34.0192499170262
2008-04-01	35.3136408894789
2008-07-01	36.2068965517241
2008-10-01	32.5157441166722
2009-01-01	34.7006285147205
2009-04-01	36.8195315077532
2009-07-01	39.9539625123315
2009-10-01	35.2440222731739
2010-01-01	38.3235485975212
2010-04-01	39.7594278283485
2010-07-01	41.0372771474878
2010-10-01	37.3385012919897
2011-01-01	36.5626005793370
2011-04-01	40.4241645244216
2011-07-01	41.4047466324567
2011-10-01	37.6440460947503
2012-01-01	36.9043811960345
2012-04-01	40.4411764705882
2012-07-01	40.2875399361022
2012-10-01	40.4845393688237
2013-01-01	40.5216284987277
2013-04-01	42.8662016487001
2013-07-01	41.6798231765077
2013-10-01	36.2009419152276
2014-01-01	36.7633302151544
2014-04-01	40.0000000000000
2014-07-01	40.2824685293215
2014-10-01	34.0127776087618
2015-01-01	33.4844363856150
2015-04-01	38.0795692491774
2015-07-01	38.7019946412623
2015-10-01	34.9600709849157
2016-01-01	33.9107457428068
2016-04-01	37.2315728380731
2016-07-01	36.5740740740741
2016-10-01	32.4956672443674
2017-01-01	31.7867435158501
2017-04-01	36.8876080691643
2017-07-01	36.6647465437788
2017-10-01	32.9201498991064
2018-01-01	33.1797235023042
2018-04-01	35.7060518731988
2018-07-01	38.0415944540728