Quarter	Percent
2005-01-01	74.4437439453816
2005-04-01	72.4370257966616
2005-07-01	74.1291130455773
2005-10-01	74.1961089727269
2006-01-01	75.1393160571272
2006-04-01	76.1230422957892
2006-07-01	75.6988428745432
2006-10-01	77.4788197487584
2007-01-01	77.1104086172579
2007-04-01	77.8363249510917
2007-07-01	75.9062794989926
2007-10-01	77.8362197990165
2008-01-01	79.2285791757050
2008-04-01	77.9628697793904
2008-07-01	77.4498042265962
2008-10-01	78.1913932416036
2009-01-01	77.4819494584838
2009-04-01	75.6167520034218
2009-07-01	76.2252914343639
2009-10-01	77.5092772015148
2010-01-01	78.2477904707447
2010-04-01	77.5311858123341
2010-07-01	77.9136760900347
2010-10-01	80.4048234280792
2011-01-01	79.9663299663300
2011-04-01	80.2500208748345
2011-07-01	79.0601151425894
2011-10-01	79.9446947483850
2012-01-01	82.1157608436322
2012-04-01	81.8781073874921
2012-07-01	81.3372577536227
2012-10-01	82.9423542538884
2013-01-01	83.1459455028224
2013-04-01	82.7207867657561
2013-07-01	82.6402984801969
2013-10-01	84.0332686857492
2014-01-01	83.1758682293885
2014-04-01	83.1818192073567
2014-07-01	81.8154894992739
2014-10-01	81.8212835433180
2015-01-01	82.9824165991720
2015-04-01	83.0533337548166
2015-07-01	82.0637340650734
2015-10-01	83.4437897725351
2016-01-01	81.7808498089560
2016-04-01	81.5557253540821
2016-07-01	81.5869894554038
2016-10-01	81.5848858193621
2017-01-01	82.1415817813383
2017-04-01	82.2941910258528
2017-07-01	82.6493605325504
2017-10-01	83.9146572070500
2018-01-01	83.9705122012809
2018-04-01	83.5674624569094
2018-07-01	81.9528737546614