Quarter	Percent
1999-07-01	52.4232123153280
1999-10-01	50.1676727028840
2000-01-01	44.5491564340158
2000-04-01	51.3185497721163
2000-07-01	51.3139456529163
2000-10-01	47.9835958097098
2001-01-01	42.5489088753961
2001-04-01	50.6343115871114
2001-07-01	50.8498970905510
2001-10-01	49.2497643993618
2002-01-01	44.5790326130582
2002-04-01	50.4377630222433
2002-07-01	49.5983380021175
2002-10-01	47.6384126786806
2003-01-01	41.5989305036309
2003-04-01	47.7087011196414
2003-07-01	47.7627787384713
2003-10-01	46.9912915086402
2004-01-01	44.3853047452902
2004-04-01	48.5289090004701
2004-07-01	48.2696493805005
2004-10-01	47.3062319416572
2005-01-01	43.6926796303229
2005-04-01	48.2915264026307
2005-07-01	47.5854862658327
2005-10-01	46.5517526130289
2006-01-01	43.5659062009715
2006-04-01	48.4487527973312
2006-07-01	47.4982479593320
2006-10-01	48.7448025253452
2007-01-01	44.2854134145316
2007-04-01	49.5164836268680
2007-07-01	48.4428444178108
2007-10-01	47.8003436862585
2008-01-01	44.4698912232781
2008-04-01	49.5165397570764
2008-07-01	49.0072260918450
2008-10-01	48.1608524082711
2009-01-01	44.3328121394042
2009-04-01	49.2483812950180
2009-07-01	48.6684900142994
2009-10-01	47.4371373532416
2010-01-01	45.1278494984452
2010-04-01	49.7652006609645
2010-07-01	49.1094294879966
2010-10-01	48.4486057249644
2011-01-01	45.3446150452774
2011-04-01	50.2986046520650
2011-07-01	50.3516613831693
2011-10-01	49.9346795346458
2012-01-01	47.8328530893280
2012-04-01	51.9490407808285
2012-07-01	50.7416410312709
2012-10-01	50.6309891073226
2013-01-01	48.3091797542593
2013-04-01	53.0496547245255
2013-07-01	52.4127910066075
2013-10-01	52.0996879798159
2014-01-01	50.8412151072988
2014-04-01	54.3435772798578
2014-07-01	53.8881330168352
2014-10-01	53.5001673404121
2015-01-01	52.2409868550226
2015-04-01	54.9796594581321
2015-07-01	55.1643379883876
2015-10-01	54.8322368166569
2016-01-01	52.7270278988128
2016-04-01	55.5060835760311
2016-07-01	55.5613222782848
2016-10-01	55.1531290068907
2017-01-01	53.7207316315739
2017-04-01	56.2763234329381
2017-07-01	56.6084900613670
2017-10-01	56.8379847046945
2018-01-01	54.5886683629927
2018-04-01	56.4491230199481
2018-07-01	56.2034573634614