Quarter	Percent
1999-04-01	51.0699001426534
2000-04-01	51.7469310670444
2001-04-01	51.9383465670248
2002-04-01	52.3920111472364
2003-01-01	50.7067943456452
2003-04-01	50.7067943456452
2003-07-01	50.7067943456452
2003-10-01	50.7067943456452
2004-01-01	50.2035278154681
2004-04-01	50.2035278154681
2004-07-01	50.2035278154681
2004-10-01	50.2035278154681
2005-01-01	50.5159264244056
2005-04-01	50.5159264244056
2005-07-01	50.5159264244056
2005-10-01	50.5159264244056
2006-01-01	47.9913606911447
2006-04-01	47.9913606911447
2006-07-01	47.9913606911447
2006-10-01	47.9913606911447
2007-01-01	48.4602224123182
2007-04-01	48.9570029799915
2007-07-01	49.1901108269395
2007-10-01	47.4605206999573
2008-01-01	49.1341991341991
2008-04-01	50.7024265644955
2008-07-01	50.2783725910064
2008-10-01	48.2966796032773
2009-01-01	50.7500000000000
2009-04-01	52.7128547579299
2009-07-01	52.2175732217573
2009-10-01	51.3289036544850
2010-01-01	51.1111111111111
2010-04-01	50.8822322527698
2010-07-01	52.2679983354141
2010-10-01	51.7410897173290
2011-01-01	52.2298111691442
2011-04-01	50.4410585404972
2011-07-01	51.1226944667201
2011-10-01	50.4205046055266
2012-01-01	50.7218103784627
2012-04-01	51.6457680250784
2012-07-01	51.6959064327485
2012-10-01	52.0654715510522
2013-01-01	50.9021113243762
2013-04-01	50.5760368663594
2013-07-01	52.2903726708074
2013-10-01	52.3846452113222
2014-01-01	51.0614101592115
2014-04-01	51.8560606060606
2014-07-01	51.0289634146341