Quarter	Percent
2007-01-01	50.7497192134471
2007-04-01	51.9699745178697
2007-07-01	51.6052109557787
2007-10-01	53.3921669164654
2008-01-01	54.4548219437044
2008-04-01	53.4101726461682
2008-07-01	53.6027751702805
2008-10-01	53.1884798040855
2009-01-01	53.3492803294345
2009-04-01	55.7697993742947
2009-07-01	54.8749629649888
2009-10-01	56.7435833112614
2010-01-01	55.7444058272014
2010-04-01	57.5723634449643
2010-07-01	57.5923726594319
2010-10-01	57.7999763310571
2011-01-01	59.7155615057044
2011-04-01	58.3252583725516
2011-07-01	58.8934143998275
2011-10-01	59.9112853011769
2012-01-01	61.0040225348395
2012-04-01	60.8018450389323
2012-07-01	60.1689480109450
2012-10-01	61.0336865124160
2013-01-01	60.3730434579973
2013-04-01	60.9705053933690
2013-07-01	61.0166143799945
2013-10-01	61.8311088155008
2014-01-01	60.2624862383325
2014-04-01	60.7938920437629
2014-07-01	62.9047515386021
2014-10-01	62.2485580691455
2015-01-01	61.6959664444771
2015-04-01	62.0730078917922
2015-07-01	61.9411277548700
2015-10-01	64.1529132735232
2016-01-01	62.2765462259187
2016-04-01	63.4424554265896
2016-07-01	63.3173419268414
2016-10-01	62.1931703337568
2017-01-01	62.7180910806545
2017-04-01	62.8735270140551
2017-07-01	63.0392052466042
2017-10-01	62.7255667687895
2018-01-01	62.9681731167405
2018-04-01	62.4134798417368