Year	Percent
1999-01-01	4.6544000000000000
2000-01-01	4.8798000000000000
2001-01-01	4.9012900000000000
2002-01-01	4.9677700000000000
2003-01-01	4.8972900000000000
2004-01-01	4.5572300000000010
2005-01-01	4.0965500000000000
2006-01-01	3.8703900000000000
2007-01-01	3.4621900000000000
2008-01-01	3.0048100000000000
2009-01-01	3.0731200000000000
2010-01-01	2.9479599999999997
2011-01-01	2.6969200000000000
2012-01-01	2.5876200000000003
2013-01-01	2.5146500000000000
2014-01-01	2.4004500000000000
2015-01-01	2.3135200000000000
2016-01-01	2.0917400000000000