Quarter	Percent
2007-01-01	88.4080426454332
2007-04-01	89.0953725008991
2007-07-01	88.6213335549306
2007-10-01	89.4676661531889
2008-01-01	89.6972240234994
2008-04-01	88.7757321465620
2008-07-01	89.1004866875987
2008-10-01	88.4717026952754
2009-01-01	89.1171895726343
2009-04-01	89.7040264998300
2009-07-01	89.3911449121621
2009-10-01	89.3030788135665
2010-01-01	89.9625566861398
2010-04-01	89.9972139390252
2010-07-01	90.1201410815681
2010-10-01	90.2730038622708
2011-01-01	90.5435136012779
2011-04-01	90.5896008957103
2011-07-01	90.9647217908266
2011-10-01	90.9517353934388
2012-01-01	91.1057996349562
2012-04-01	90.6762101518294
2012-07-01	90.7140257829802
2012-10-01	90.9908716220352
2013-01-01	90.5470463349431
2013-04-01	90.6162641224553
2013-07-01	91.2349397231732
2013-10-01	90.9511366409882
2014-01-01	91.2751416967070
2014-04-01	91.4098490018754
2014-07-01	91.0078437406567
2014-10-01	91.3224613541292
2015-01-01	91.0989945418889
2015-04-01	90.8772233282052
2015-07-01	91.2821241393849
2015-10-01	91.2305167292976
2016-01-01	90.8317375031991
2016-04-01	91.1726469863314
2016-07-01	90.8440359804502
2016-10-01	91.2911759665338
2017-01-01	90.5275010030249
2017-04-01	90.7108422315061
2017-07-01	90.7793869951436
2017-10-01	90.0186818906969
2018-01-01	90.2934376124965
2018-04-01	90.2542534397774