Quarter	Percent
1999-04-01	21.80000000000000
2000-01-01	25.80000000000000
2000-04-01	19.70000000000000
2000-07-01	24.90000000000000
2000-10-01	24.40000000000000
2001-01-01	25.50000000000000
2001-04-01	31.80000000000000
2001-07-01	22.50000000000000
2001-10-01	21.80000000000000
2002-01-01	25.40000000000000
2002-04-01	24.70000000000000
2002-07-01	25.50000000000000
2002-10-01	21.20000000000000
2003-01-01	22.80000000000000
2003-04-01	31.90000000000000
2003-07-01	31.10000000000000
2003-10-01	19.90000000000000
2004-01-01	33.80000000000000
2004-04-01	23.90000000000000
2004-10-01	24.30000000000000
2008-07-01	15.40000000000000
2008-10-01	14.60000000000000
2009-01-01	16.70000000000000
2009-04-01	16.90000000000000
2009-07-01	28.00000000000000
2009-10-01	25.90000000000000
2010-01-01	31.30000000000000
2010-04-01	36.50000000000000
2010-07-01	30.50000000000000
2010-10-01	19.00000000000000
2011-01-01	17.70000000000000
2011-04-01	20.00000000000000
2011-07-01	23.40000000000000
2011-10-01	21.90000000000000
2012-01-01	18.70000000000000
2012-04-01	17.90000000000000
2012-07-01	20.70000000000000
2012-10-01	16.40000000000000
2013-01-01	21.10000000000000
2013-04-01	16.50000000000000
2013-07-01	19.20000000000000
2013-10-01	22.30000000000000
2014-01-01	14.70000000000000
2014-04-01	9.70000000000000
2014-07-01	7.70000000000000
2014-10-01	7.40000000000000
2015-01-01	10.84337349397590
2015-04-01	11.37254901960780
2015-07-01	11.33603238866400
2015-10-01	14.72868217054260
2016-01-01	7.44186046511628
2016-04-01	11.15107913669060
2016-07-01	10.88435374149660
2016-10-01	12.07547169811320
2017-01-01	13.79310344827590
2017-04-01	14.98127340823970
2017-07-01	4.77941176470588
2017-10-01	7.01107011070111
2018-01-01	15.05376344086020
2018-04-01	5.19031141868512