Year	Percent
1996-01-01	8.1407600000000000
1997-01-01	6.6055600000000005
1998-01-01	6.3057200000000000
1999-01-01	5.0437600000000000
2000-01-01	5.0864500000000000
2001-01-01	3.9536000000000000
2002-01-01	4.3378800000000000
2003-01-01	4.4074300000000010
2004-01-01	3.8642700000000000
2005-01-01	3.7462199999999997
2006-01-01	4.2308600000000000
2007-01-01	3.6195500000000000
2008-01-01	3.3834000000000000
2009-01-01	3.3187900000000004
2010-01-01	3.3256000000000000
2011-01-01	2.8773700000000000
2012-01-01	2.8993500000000000
2013-01-01	2.8794299999999997
2014-01-01	3.0456400000000000
2015-01-01	2.2359600000000000
2016-01-01	2.5007500000000000