Quarter	Percent
2005-01-01	22.8007319360940
2005-04-01	23.5842185128983
2005-07-01	22.2289274776338
2005-10-01	23.0750797525798
2006-01-01	21.7881177867779
2006-04-01	20.6117727968989
2006-07-01	21.1007917174178
2006-10-01	19.9547180835524
2007-01-01	20.2523123756000
2007-04-01	19.3862542660898
2007-07-01	20.3742057286163
2007-10-01	19.0791818117027
2008-01-01	18.4463123644252
2008-04-01	18.5955666198787
2008-07-01	19.2662122790134
2008-10-01	18.6888504530552
2009-01-01	18.5456420835482
2009-04-01	18.6390569764370
2009-07-01	18.3413583375570
2009-10-01	18.6189951492585
2010-01-01	17.9608935075267
2010-04-01	18.7164971694805
2010-07-01	17.9520042966652
2010-10-01	16.6116374772706
2011-01-01	16.8762214216760
2011-04-01	16.8227309054907
2011-07-01	17.8093696369235
2011-10-01	16.7798994016544
2012-01-01	15.3075344753543
2012-04-01	14.6707984109407
2012-07-01	15.5927748299921
2012-10-01	14.3986789389023
2013-01-01	14.1687844126626
2013-04-01	14.5104229283338
2013-07-01	14.8166864193004
2013-10-01	13.8324602339755
2014-01-01	14.2078287023096
2014-04-01	13.0708774842036
2014-07-01	14.5802660290676
2014-10-01	15.0896604424963
2015-01-01	14.6192610074230
2015-04-01	14.2548442297208
2015-07-01	14.5496348621279
2015-10-01	13.9963887755955
2016-01-01	15.1668609089958
2016-04-01	15.0414932682656
2016-07-01	15.2137878805927
2016-10-01	15.2603375744486
2017-01-01	14.6335587273296
2017-04-01	13.7954095343028
2017-07-01	14.0731488861941
2017-10-01	12.6533513000066
2018-01-01	12.9767017709408
2018-04-01	12.8358272997973
2018-07-01	13.8810053259554