Quarter	Percent
2005-01-01	64.9441173774851
2005-04-01	65.5737215115480
2005-07-01	65.7233442270576
2005-10-01	65.6633996844186
2006-01-01	65.6360544522941
2006-04-01	66.3403991645478
2006-07-01	66.2183433464310
2006-10-01	66.2743359275545
2007-01-01	66.2081107562636
2007-04-01	66.7954189854651
2007-07-01	66.7803432001621
2007-10-01	66.7857440295389
2008-01-01	66.7733994372913
2008-04-01	67.2682730745173
2008-07-01	67.0962763685093
2008-10-01	67.3317846622278
2009-01-01	67.2564811697103
2009-04-01	67.5982210655225
2009-07-01	67.2581968703284
2009-10-01	67.2867271294192
2010-01-01	67.3965399981613
2010-04-01	67.7791116040087
2010-07-01	67.5259359334849
2010-10-01	67.3075558336164
2011-01-01	67.3321958941451
2011-04-01	67.8074577787326
2011-07-01	67.6038213219829
2011-10-01	67.9627852141899
2012-01-01	67.7928779166868
2012-04-01	68.5126413002873
2012-07-01	68.7111675130863
2012-10-01	69.1794383553060
2013-01-01	68.8017402626966
2013-04-01	69.1623883355673
2013-07-01	69.3978813758556
2013-10-01	69.5958502628703
2014-01-01	69.3638280515701
2014-04-01	70.0138662164040
2014-07-01	70.1583005111177
2014-10-01	70.3662809716166
2015-01-01	70.1049975545951
2015-04-01	70.6355709624772
2015-07-01	70.6535831474934
2015-10-01	70.7298495706902
2016-01-01	70.9132660584532
2016-04-01	71.4254188105860
2016-07-01	71.5933452312188
2016-10-01	71.7797691785057
2017-01-01	71.5796633398100
2017-04-01	72.2277125881722
2017-07-01	72.4662417440125
2017-10-01	72.7382346814685
2018-01-01	72.4111015107843
2018-04-01	73.0466248698062