Year	Percent
1996-01-01	21.350400000000000
1997-01-01	19.805999999999997
1998-01-01	20.796200000000000
1999-01-01	20.312500000000000
2000-01-01	20.379100000000000
2001-01-01	21.362200000000000
2002-01-01	21.022700000000000
2003-01-01	18.440900000000000
2004-01-01	22.077900000000000
2005-01-01	22.978700000000000
2006-01-01	24.290600000000000
2007-01-01	30.872500000000000
2008-01-01	28.308100000000000
2009-01-01	32.223800000000000
2010-01-01	35.575800000000000
2011-01-01	35.135600000000000
2012-01-01	35.419000000000004
2013-01-01	36.488900000000000
2014-01-01	34.736100000000000