Quarter	Percent
2005-01-01	71.7239317147252
2005-04-01	70.5546572686671
2005-07-01	70.4712863383894
2005-10-01	71.5817452808938
2006-01-01	72.4475762870104
2006-04-01	71.3584174718251
2006-07-01	71.6281089471156
2006-10-01	72.5822207749919
2007-01-01	73.2110290566017
2007-04-01	72.2662870811291
2007-07-01	71.3112767209972
2007-10-01	72.6024952190146
2008-01-01	73.3573251158756
2008-04-01	72.1705419334970
2008-07-01	72.3415431938307
2008-10-01	72.4563673253161
2009-01-01	71.2952192207718
2009-04-01	69.2255408049740
2009-07-01	69.3948936927320
2009-10-01	70.2788115016202
2010-01-01	71.2692817231993
2010-04-01	71.5175452993987
2010-07-01	72.3549254803690
2010-10-01	73.0884003085770
2011-01-01	73.8356025588619
2011-04-01	73.4864391798176
2011-07-01	73.2971783384422
2011-10-01	73.7789252514517
2012-01-01	74.3335229989982
2012-04-01	73.2241727818773
2012-07-01	73.0890343631330
2012-10-01	73.8053914413697
2013-01-01	74.2430050204403
2013-04-01	73.3434220069721
2013-07-01	73.4466859659321
2013-10-01	74.0028694755440
2014-01-01	73.3136604158414
2014-04-01	72.7609713823995
2014-07-01	71.9137407741960
2014-10-01	73.0574960172336
2015-01-01	73.6825169433420
2015-04-01	72.8998183602400
2015-07-01	72.5900094501580
2015-10-01	72.8146473986165
2016-01-01	73.0208994682246
2016-04-01	71.8711959632709
2016-07-01	72.0887780057733
2016-10-01	72.4936591249374
2017-01-01	73.0913688963671
2017-04-01	72.1375655212360
2017-07-01	71.9747897871106
2017-10-01	72.6667592606144
2018-01-01	72.3865946142872
2018-04-01	72.1593899836395
2018-07-01	71.3818464714951