Quarter	Percent
1999-07-01	28.5097836844583
1999-10-01	28.3872809890370
2000-01-01	29.3531962202299
2000-04-01	28.8724931300149
2000-07-01	29.8779631141945
2000-10-01	29.5077525940999
2001-01-01	29.5779843336794
2001-04-01	30.1127211821298
2001-07-01	30.8327301762184
2001-10-01	30.2039692134384
2002-01-01	31.7748449932200
2002-04-01	31.7147528841265
2002-07-01	31.7779297306302
2002-10-01	31.0085145368029
2003-01-01	31.1888568868488
2003-04-01	30.4857801793349
2003-07-01	31.6789353303067
2003-10-01	30.7875407983121
2004-01-01	31.4128191211140
2004-04-01	31.0912160632110
2004-07-01	31.9442451261420
2004-10-01	31.5270403515139
2005-01-01	31.0586755192779
2005-04-01	30.7412129168603
2005-07-01	31.0403096389513
2005-10-01	29.0959627317273
2006-01-01	28.9928899804621
2006-04-01	28.3433651229635
2006-07-01	28.1406063922139
2006-10-01	26.4447320594703
2007-01-01	27.2018561227896
2007-04-01	26.0893428494596
2007-07-01	26.3769635415392
2007-10-01	25.2016187560539
2008-01-01	24.6950323313914
2008-04-01	24.3268181581292
2008-07-01	23.9077873545955
2008-10-01	21.7074291651909
2009-01-01	21.7194683375468
2009-04-01	22.6733174354306
2009-07-01	23.5731488610579
2009-10-01	21.9386348547529
2010-01-01	22.3599434961996
2010-04-01	22.6692602920602
2010-07-01	23.3264245729370
2010-10-01	22.3504728144392
2011-01-01	23.0697577519541
2011-04-01	23.0076936229016
2011-07-01	23.7290628137540
2011-10-01	22.9630383327774
2012-01-01	23.7456199687269
2012-04-01	24.3337882335818
2012-07-01	24.8165053935503
2012-10-01	23.5336284982155
2013-01-01	23.4822776534748
2013-04-01	23.6142147919821
2013-07-01	24.4838041078702
2013-10-01	24.1556729762870
2014-01-01	25.1246722242069
2014-04-01	24.9550477032346
2014-07-01	26.8076165473769
2014-10-01	25.5080615588988
2015-01-01	26.1012135791407
2015-04-01	26.7501821597923
2015-07-01	27.4121164088561
2015-10-01	26.6510407842855
2016-01-01	26.3259663531510
2016-04-01	26.9694893547453
2016-07-01	27.6710263977115
2016-10-01	26.7802177750337
2017-01-01	26.6932909412392
2017-04-01	27.7250835994496
2017-07-01	27.9922126313966
2017-10-01	26.2270021422781
2018-01-01	26.3184293541466
2018-04-01	26.0816141886490
2018-07-01	26.3999198489186