Quarter	Percent
1999-07-01	35.4463658131023
1999-10-01	35.3557032839998
2000-01-01	36.5914399898417
2000-04-01	35.2940115975955
2000-07-01	35.0505133454007
2000-10-01	35.1587524191035
2001-01-01	36.5392785840322
2001-04-01	34.4925804614458
2001-07-01	34.7159046492937
2001-10-01	34.6173017580356
2002-01-01	35.2672573926858
2002-04-01	33.7863733176328
2002-07-01	34.0721285298881
2002-10-01	34.2932688685644
2003-01-01	35.3923613742309
2003-04-01	34.1944192089680
2003-07-01	34.3686155798571
2003-10-01	34.1513991785802
2004-01-01	34.3309976777369
2004-04-01	33.3291281586178
2004-07-01	33.6820169661753
2004-10-01	33.4452510013065
2005-01-01	34.3590441769385
2005-04-01	33.1601776740259
2005-07-01	33.5552114507419
2005-10-01	33.5438876038974
2006-01-01	34.2726594222555
2006-04-01	33.0838502085363
2006-07-01	33.5302034118566
2006-10-01	33.5296376847666
2007-01-01	34.3329013800780
2007-04-01	33.0422752367944
2007-07-01	33.4681135102035
2007-10-01	33.5042018912047
2008-01-01	34.5178602079091
2008-04-01	33.1426213623788
2008-07-01	33.7269869681026
2008-10-01	34.0041687213927
2009-01-01	35.3179170682026
2009-04-01	33.8543064659003
2009-07-01	34.2829795028745
2009-10-01	34.4981388028991
2010-01-01	34.9339846985563
2010-04-01	33.5708029306531
2010-07-01	33.8449369664574
2010-10-01	34.1040803549417
2011-01-01	34.6382967823389
2011-04-01	33.1056346851423
2011-07-01	33.6926094263555
2011-10-01	33.6861073453239
2012-01-01	34.2690536094670
2012-04-01	32.7609549090815
2012-07-01	33.2171612765209
2012-10-01	33.6321636884449
2013-01-01	34.4693154523069
2013-04-01	32.8043707287422
2013-07-01	32.8059333458131
2013-10-01	32.8135085756913
2014-01-01	32.7812179585219
2014-04-01	31.5854403925672
2014-07-01	31.6330147215211
2014-10-01	31.9046192759441
2015-01-01	32.2248080276090
2015-04-01	31.1857068770585
2015-07-01	31.3008879439837
2015-10-01	31.5415036570868
2016-01-01	31.9640372697016
2016-04-01	31.1192114966659
2016-07-01	30.9483748717446
2016-10-01	31.2338476402465
2017-01-01	31.4036844328405
2017-04-01	30.3106628807952
2017-07-01	30.5103187510194
2017-10-01	30.8325490622032
2018-01-01	31.1591030942030
2018-04-01	30.2458893083798
2018-07-01	30.4762883063269