Year	Percent
1996-01-01	4.612060000000000
1997-01-01	5.134119999999999
1998-01-01	5.038869999999999
1999-01-01	4.248980000000000
2000-01-01	5.107970000000000
2001-01-01	5.617600000000000
2002-01-01	6.110360000000000
2003-01-01	6.296410000000000
2004-01-01	7.226220000000000
2005-01-01	7.374140000000000
2006-01-01	5.398890000000000
2007-01-01	6.157160000000000
2008-01-01	6.393610000000000
2009-01-01	5.560330000000000
2010-01-01	5.158410000000000
2011-01-01	4.362980000000000
2012-01-01	4.464990000000000
2013-01-01	4.775550000000000
2014-01-01	4.513120000000000
2015-01-01	5.009370000000000
2016-01-01	4.318600000000000