Year	Percent
1999-01-01	4.1995500000000000
2000-01-01	4.9623200000000000
2001-01-01	5.2582100000000000
2002-01-01	5.1885000000000000
2003-01-01	5.5085200000000000
2004-01-01	7.8374000000000000
2005-01-01	6.5802700000000000
2006-01-01	7.4440800000000005
2007-01-01	7.6740800000000000
2008-01-01	3.9422400000000000
2009-01-01	5.5343200000000000
2010-01-01	5.1221200000000000
2011-01-01	4.0929000000000000
2012-01-01	4.3184200000000000
2013-01-01	3.7106500000000000
2014-01-01	3.5085699999999997
2015-01-01	3.5753699999999995
2016-01-01	3.0771300000000000