Year	Percent
1999-01-01	10.328000000000000
2000-01-01	10.358600000000000
2001-01-01	10.058000000000000
2002-01-01	11.750300000000000
2003-01-01	13.457000000000000
2004-01-01	16.320700000000000
2005-01-01	18.665500000000000
2006-01-01	23.604100000000000
2007-01-01	19.262700000000000
2008-01-01	12.451600000000000
2009-01-01	11.762600000000000
2010-01-01	17.686000000000000
2011-01-01	11.337700000000000
2012-01-01	14.719000000000001
2013-01-01	14.662100000000000
2014-01-01	15.076100000000000
2015-01-01	16.019700000000000
2016-01-01	16.285900000000000