Quarter	Percent
2005-01-01	46.5353447723807
2005-04-01	45.8161735806122
2005-07-01	45.5938393673005
2005-10-01	45.5267178037975
2006-01-01	45.5920687622368
2006-04-01	44.8043939937216
2006-07-01	44.7016470664418
2006-10-01	44.5622727140042
2007-01-01	44.7674925625644
2007-04-01	44.1408121899501
2007-07-01	44.1693414380244
2007-10-01	43.9973235171357
2008-01-01	44.1617830410850
2008-04-01	43.5402352392533
2008-07-01	43.7231427748614
2008-10-01	43.4146758539307
2009-01-01	43.4238992565037
2009-04-01	42.7899910830919
2009-07-01	43.0474949901232
2009-10-01	42.9966917641609
2010-01-01	42.9123235987845
2010-04-01	42.3768628908981
2010-07-01	42.4207867023229
2010-10-01	42.6544707122257
2011-01-01	42.6111178899783
2011-04-01	41.9847713699752
2011-07-01	42.0589746879993
2011-10-01	41.8557932299550
2012-01-01	41.8659380645102
2012-04-01	41.1394909442784
2012-07-01	41.1192174077850
2012-10-01	40.7045113477792
2013-01-01	40.8068342659183
2013-04-01	40.3412679571983
2013-07-01	40.2061883695601
2013-10-01	39.9912511092729
2014-01-01	40.0947215844135
2014-04-01	39.4633315485786
2014-07-01	39.4317723532681
2014-10-01	39.1623685037732
2015-01-01	39.3494275100083
2015-04-01	38.8634652082549
2015-07-01	38.7179524428337
2015-10-01	38.4789764138250
2016-01-01	38.3415382376438
2016-04-01	37.8806666141082
2016-07-01	37.7932136016979
2016-10-01	37.5277071898320
2017-01-01	37.5157189175121
2017-04-01	36.9673258337759
2017-07-01	36.7501194734706
2017-10-01	36.5176853179710
2018-01-01	36.6444761359625
2018-04-01	36.1245785474831