Year	Percent
1996-01-01	17.980900000000000
1997-01-01	12.790800000000000
1998-01-01	8.944289999999999
1999-01-01	16.996500000000000
2000-01-01	23.479900000000000
2001-01-01	22.604300000000000
2002-01-01	27.744300000000000
2003-01-01	23.291100000000000
2004-01-01	33.268000000000000
2005-01-01	36.535900000000000
2006-01-01	33.294700000000000
2007-01-01	24.961100000000000
2008-01-01	28.556300000000000
2009-01-01	37.188600000000000
2010-01-01	33.781200000000000
2011-01-01	33.013100000000000
2012-01-01	33.368600000000000
2013-01-01	25.139500000000000
2014-01-01	22.426000000000000