Quarter	Percent
2005-01-01	66.2086121646792
2005-04-01	66.5945574470656
2005-07-01	64.8374803388060
2005-10-01	65.0875647709509
2006-01-01	66.1971442223589
2006-04-01	65.6214349179730
2006-07-01	63.9405540252894
2006-10-01	64.3145621323974
2007-01-01	65.3158468719176
2007-04-01	65.9656270402910
2007-07-01	64.9705961352218
2007-10-01	63.3479194301256
2008-01-01	65.5721987007988
2008-04-01	65.6673217289683
2008-07-01	65.5665059257738
2008-10-01	66.6050060599117
2009-01-01	67.9478560847083
2009-04-01	67.8912348783694
2009-07-01	65.3287925341786
2009-10-01	65.2675032707066
2010-01-01	67.1192455406484
2010-04-01	66.8974259006323
2010-07-01	65.3731535687471
2010-10-01	67.4182214261332
2011-01-01	68.6196945339626
2011-04-01	67.1632737427028
2011-07-01	66.3369030563789
2011-10-01	64.7949110803253
2012-01-01	67.9428152496720
2012-04-01	65.9323265084083
2012-07-01	64.9983848378362
2012-10-01	65.9327768547224
2013-01-01	68.4097980847513
2013-04-01	66.3861738611983
2013-07-01	66.8139542075369
2013-10-01	66.0910069771165
2014-01-01	68.1288943667437
2014-04-01	67.8441555436006
2014-07-01	67.3875715376353
2014-10-01	68.6058666374406
2015-01-01	69.8483140730911
2015-04-01	68.9923592326002
2015-07-01	67.7948881774846
2015-10-01	67.0799589893117
2016-01-01	70.0066612908881
2016-04-01	69.0510574676250
2016-07-01	67.4329866142146
2016-10-01	68.7674531222066
2017-01-01	69.9571968152776
2017-04-01	69.6550233531073
2017-07-01	68.7074547282788
2017-10-01	68.6694014028287
2018-01-01	70.4335304234931
2018-04-01	68.5178679963211