Quarter	Percent
2005-01-01	68.8539605152100
2005-04-01	69.3301009110068
2005-07-01	69.2360387303785
2005-10-01	69.5782471497693
2006-01-01	69.4274034850709
2006-04-01	69.8561968322386
2006-07-01	69.8034795843739
2006-10-01	70.0431396669008
2007-01-01	69.6804493784707
2007-04-01	70.0985266705658
2007-07-01	69.9852746511792
2007-10-01	70.4207480907630
2008-01-01	70.1721924071574
2008-04-01	70.6778062766427
2008-07-01	70.4880210744352
2008-10-01	70.8564209936058
2009-01-01	70.5858476341254
2009-04-01	70.9225640444616
2009-07-01	70.9916694266616
2009-10-01	71.1690198480555
2010-01-01	70.9337589773024
2010-04-01	71.3277299184785
2010-07-01	71.0206964717344
2010-10-01	71.2160305103141
2011-01-01	70.9937840608881
2011-04-01	71.4385643206119
2011-07-01	71.1984537011013
2011-10-01	71.5425164354985
2012-01-01	71.2968350699287
2012-04-01	71.8142326391462
2012-07-01	71.6595130080426
2012-10-01	71.9142608782274
2013-01-01	71.6040308466833
2013-04-01	72.0465014590512
2013-07-01	71.7999818344359
2013-10-01	72.0320450102829
2014-01-01	71.9017391739143
2014-04-01	72.0510432743995
2014-07-01	71.8139795912913
2014-10-01	72.2173397965950
2015-01-01	71.9159765556762
2015-04-01	72.2712513755654
2015-07-01	71.9252908111812
2015-10-01	72.5091553865202
2016-01-01	72.3852752895384
2016-04-01	72.5901303970261
2016-07-01	72.6175588968880
2016-10-01	72.9107359320274
2017-01-01	72.7694086713530
2017-04-01	73.0541918527562
2017-07-01	72.9645183257018
2017-10-01	73.3339928798569
2018-01-01	73.2162384984849
2018-04-01	73.5270440027152