Year	Percent
1999-01-01	2.9906700000000000
2000-01-01	2.6470300000000000
2001-01-01	4.4547800000000000
2002-01-01	4.6526100000000000
2003-01-01	4.5130700000000000
2004-01-01	5.5697000000000000
2005-01-01	4.7901700000000000
2006-01-01	5.3782900000000000
2007-01-01	4.0325900000000000
2008-01-01	3.8230699999999995
2009-01-01	5.6296100000000000
2010-01-01	5.4945600000000000
2011-01-01	5.3562699999999990
2012-01-01	13.4297000000000000
2013-01-01	12.5414000000000000
2014-01-01	18.9261000000000000
2015-01-01	25.1040000000000000
2016-01-01	31.5840000000000000