Quarter	Percent
2005-01-01	57.2638473975893
2005-04-01	56.7646660645112
2005-07-01	55.9277646707203
2005-10-01	55.6950407110808
2006-01-01	55.8140887430625
2006-04-01	55.5613670488442
2006-07-01	54.4764741038938
2006-10-01	54.4502386117041
2007-01-01	55.0946652490873
2007-04-01	54.8321150812126
2007-07-01	54.7712479940940
2007-10-01	53.5265733258032
2008-01-01	54.6213619958554
2008-04-01	54.2681366977079
2008-07-01	54.9472815756866
2008-10-01	55.2195844576969
2009-01-01	55.3717311571871
2009-04-01	55.0308227872199
2009-07-01	52.9189751628864
2009-10-01	53.3427507777334
2010-01-01	54.6907575336783
2010-04-01	53.7591005080720
2010-07-01	53.8672256524670
2010-10-01	55.1226855160966
2011-01-01	55.2786445849313
2011-04-01	54.1207310319933
2011-07-01	53.6396571472811
2011-10-01	52.3164219646203
2012-01-01	53.8672649446023
2012-04-01	52.2674267554776
2012-07-01	52.0609401978674
2012-10-01	52.7419174159024
2013-01-01	53.8200341420258
2013-04-01	52.2233170742841
2013-07-01	52.3497661681618
2013-10-01	52.0059615350888
2014-01-01	53.3678458247854
2014-04-01	53.1856689429534
2014-07-01	53.4628468405639
2014-10-01	53.6839583967498
2015-01-01	54.0768730833962
2015-04-01	53.3747304193701
2015-07-01	53.0296856255886
2015-10-01	52.1351247081054
2016-01-01	53.5710511531505
2016-04-01	53.0504911666528
2016-07-01	52.4202777988570
2016-10-01	53.0267991280764
2017-01-01	53.5140077012102
2017-04-01	53.3386013963972
2017-07-01	53.4628223082456
2017-10-01	52.9969616647519
2018-01-01	53.6588880797060
2018-04-01	52.5580055497111