Year	Percent
1995-01-01	31.0413267750000
1996-01-01	31.7729261100000
1997-01-01	32.2144330250000
1998-01-01	32.6629366000000
1999-01-01	32.9511158875000
2000-01-01	32.9139148675000
2001-01-01	33.0966041200000
2002-01-01	33.6848124725000
2003-01-01	33.6758545575000
2004-01-01	33.1826538575000
2005-01-01	33.2099163350000
2006-01-01	32.7672924200000
2007-01-01	32.0233432200000
2008-01-01	31.9478247000000
2009-01-01	32.2303373900000
2010-01-01	31.8494429775000
2011-01-01	30.8535226200000
2012-01-01	24.1166666666667
2013-01-01	24.0416666666667
2014-01-01	23.9333333333333
2015-01-01	23.8916666666667
2016-01-01	24.3500000000000
2017-01-01	24.3750000000000