Quarter	Percent
2005-01-01	20.5297067750344
2005-04-01	19.9670848458782
2005-07-01	19.5193232094072
2005-10-01	20.0360564783290
2006-01-01	20.3783584296071
2006-04-01	19.7570092364398
2006-07-01	19.3784858842055
2006-10-01	19.8379030186632
2007-01-01	20.2632415612595
2007-04-01	19.7120258887702
2007-07-01	19.4231497357816
2007-10-01	19.8839974365880
2008-01-01	20.2721987342320
2008-04-01	19.6280450012005
2008-07-01	19.3488947855855
2008-10-01	19.9959842870552
2009-01-01	20.5475388237356
2009-04-01	20.1106831517113
2009-07-01	19.9990249043869
2009-10-01	20.6243915161013
2010-01-01	20.9006657720076
2010-04-01	20.3119737450088
2010-07-01	20.2142674876819
2010-10-01	20.8322481493891
2011-01-01	21.0942455606876
2011-04-01	20.5323493958755
2011-07-01	20.3367849884343
2011-10-01	20.6957921809212
2012-01-01	21.1675925660543
2012-04-01	20.4338062857947
2012-07-01	20.1521507001508
2012-10-01	20.5603216667365
2013-01-01	21.0228446483274
2013-04-01	20.3706718943456
2013-07-01	20.1560375605168
2013-10-01	20.6780302754797
2014-01-01	20.9180196517591
2014-04-01	20.4322534740775
2014-07-01	20.0336769313369
2014-10-01	20.5157743328630
2015-01-01	20.7554029846967
2015-04-01	20.3269112583377
2015-07-01	20.0487005580109
2015-10-01	20.3878892993290
2016-01-01	20.6049743047535
2016-04-01	20.0456775200209
2016-07-01	19.7299826967316
2016-10-01	20.1244053116330
2017-01-01	20.3842379809471
2017-04-01	19.8409329685282
2017-07-01	19.5112690198608
2017-10-01	19.9627122689242
2018-01-01	20.1073627823662
2018-04-01	19.5628243575999