Quarter	Percent
2005-01-01	76.7723203869248
2005-04-01	77.4596029333216
2005-07-01	78.8826903713347
2005-10-01	79.5259333193690
2006-01-01	79.9232501740155
2006-04-01	80.5878351602362
2006-07-01	79.8928394548537
2006-10-01	79.9031635985953
2007-01-01	78.0720089447655
2007-04-01	79.2917019980992
2007-07-01	77.6105392787450
2007-10-01	78.3328368061032
2008-01-01	78.1632358582739
2008-04-01	78.3785135540662
2008-07-01	76.7051741371888
2008-10-01	75.5898743545744
2009-01-01	75.8593574668634
2009-04-01	74.9962685361857
2009-07-01	75.9645679874528
2009-10-01	76.4056424859389
2010-01-01	75.3618833107516
2010-04-01	75.8535151900257
2010-07-01	75.0206166462355
2010-10-01	73.3992274525776
2011-01-01	74.3229407333793
2011-04-01	74.2866760349800
2011-07-01	75.0057388765269
2011-10-01	74.9611695717294
2012-01-01	75.3708690043333
2012-04-01	76.6610406570040
2012-07-01	77.0266021344297
2012-10-01	75.6316512394652
2013-01-01	75.0252694989951
2013-04-01	75.4159935076249
2013-07-01	75.5152913799520
2013-10-01	76.3250522530182
2014-01-01	75.5072032714089
2014-04-01	76.0652524637705
2014-07-01	76.8855383680223
2014-10-01	76.6997084010253
2015-01-01	76.5605717067187
2015-04-01	75.6783985008388
2015-07-01	76.2597850054507
2015-10-01	74.8695635727287
2016-01-01	74.5801075632414
2016-04-01	75.8087885796879
2016-07-01	75.5681893180343
2016-10-01	77.2875122049264
2017-01-01	76.2988338344999
2017-04-01	76.8216777642603
2017-07-01	76.8820385115964
2017-10-01	75.7101325491789
2018-01-01	76.4174007568012
2018-04-01	76.2937694152476