Quarter	Percent
2005-01-01	64.3460529501412
2005-04-01	65.0263237149823
2005-07-01	64.8838729755729
2005-10-01	65.2298871267596
2006-01-01	65.1278738122906
2006-04-01	65.8956171372608
2006-07-01	65.7755960129452
2006-10-01	66.2040832276271
2007-01-01	65.8419353583358
2007-04-01	66.5002590500972
2007-07-01	66.2744837964152
2007-10-01	66.7957628246224
2008-01-01	66.4244351423927
2008-04-01	67.0146096325437
2008-07-01	66.6396691580877
2008-10-01	66.8395557808131
2009-01-01	65.8310307510448
2009-04-01	66.0892477023285
2009-07-01	65.8148915364184
2009-10-01	66.0965763370100
2010-01-01	65.5364358720569
2010-04-01	66.1463959685921
2010-07-01	65.7376913983760
2010-10-01	66.0179348820398
2011-01-01	65.7366083097660
2011-04-01	66.3344345124304
2011-07-01	65.9120993662956
2011-10-01	66.3310465708645
2012-01-01	65.8421275600721
2012-04-01	66.5633627117662
2012-07-01	66.2577337656479
2012-10-01	66.5624575990915
2013-01-01	66.0531041577168
2013-04-01	66.7139087560216
2013-07-01	66.4979276207355
2013-10-01	66.8363774856312
2014-01-01	66.5915707051528
2014-04-01	67.0175244753246
2014-07-01	66.7250351936060
2014-10-01	67.2955106504395
2015-01-01	67.0020085667752
2015-04-01	67.5417164103595
2015-07-01	67.2938621908398
2015-10-01	67.9175420761277
2016-01-01	67.7377251849922
2016-04-01	68.1820550519985
2016-07-01	68.1208063028384
2016-10-01	68.5532928456489
2017-01-01	68.3413281552263
2017-04-01	68.9494887950677
2017-07-01	68.8313785019906
2017-10-01	69.4071273681473
2018-01-01	69.1799409143451
2018-04-01	69.7860116150179