Year	Percent
1996-01-01	46.153800000000000
1997-01-01	50.112100000000000
1998-01-01	38.866300000000000
1999-01-01	56.351500000000000
2000-01-01	49.607100000000000
2001-01-01	36.389700000000000
2002-01-01	37.737400000000000
2003-01-01	28.052900000000000
2004-01-01	38.546500000000000
2005-01-01	34.750300000000000
2006-01-01	33.827000000000000
2007-01-01	29.646900000000000
2008-01-01	42.789600000000000
2009-01-01	43.420700000000000
2010-01-01	44.255300000000000
2011-01-01	44.611000000000004
2012-01-01	40.109900000000000
2013-01-01	57.586600000000000
2014-01-01	57.488400000000000