Year	Percent
1996-01-01	12.265900000000000
1997-01-01	13.953500000000000
1998-01-01	31.450300000000000
1999-01-01	29.148000000000003
2000-01-01	19.179200000000000
2001-01-01	26.417300000000000
2002-01-01	31.467800000000000
2003-01-01	37.800600000000000
2004-01-01	31.181500000000000
2005-01-01	34.374200000000000
2006-01-01	30.545400000000000
2007-01-01	35.868800000000000
2008-01-01	31.146300000000000
2009-01-01	34.736800000000000
2010-01-01	30.830400000000000
2011-01-01	28.524300000000000
2012-01-01	26.943000000000000
2013-01-01	29.552500000000000
2014-01-01	24.183800000000000
2015-01-01	23.676500000000000
2016-01-01	27.270800000000000