Quarter	Percent
1999-04-01	2.64327485380117
2000-04-01	2.27811083491739
2001-04-01	1.98048303059961
2002-04-01	2.48014172238414
2003-04-01	3.38274742340816
2004-04-01	3.76345597121898
2005-04-01	3.74379289181499
2006-04-01	3.37871492611655
2007-04-01	3.08181917092808
2008-04-01	2.75823621545568
2009-04-01	3.41158059467919
2010-01-01	4.70463294836055
2010-04-01	4.16973781194061
2010-07-01	4.16139574109214
2010-10-01	3.92445683623547
2011-01-01	4.16742730473334
2011-04-01	3.57828636670299
2011-07-01	3.83548863606914
2011-10-01	3.88247369771619
2012-01-01	3.98643789170862
2012-04-01	3.73438694876370
2012-07-01	3.78076630296879
2012-10-01	3.97580604342765
2013-01-01	4.53257073442324
2013-04-01	4.06602254428341
2013-07-01	4.03393829856666
2013-10-01	3.81149689239448
2014-01-01	4.64716863721220
2014-04-01	4.18266863613983
2014-07-01	4.14380275105194
2014-10-01	4.00038862305992
2015-01-01	4.33119477060888
2015-04-01	4.07600145225705
2015-07-01	4.28837637036858
2015-10-01	4.08363671201380
2016-01-01	4.87311336475742
2016-04-01	4.29979807578097
2016-07-01	4.19741369082928
2016-10-01	4.12268895657718
2017-01-01	4.87280121051636
2017-04-01	4.04470588235294
2017-07-01	4.16038091646238
2017-10-01	4.19933990309216
2018-01-01	4.72023892855476
2018-04-01	4.37737774890972