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	5.5223900000000010
2005-01-01	4.0762500000000000
2006-01-01	3.5855300000000003
2007-01-01	2.6873800000000000
2008-01-01	3.0568100000000000
2009-01-01	4.5005600000000000
2010-01-01	4.3964700000000000
2011-01-01	5.3562699999999990
2012-01-01	13.4297000000000000
2013-01-01	12.5414000000000000
2014-01-01	18.2846000000000000
2015-01-01	24.3590000000000000
2016-01-01	30.3039000000000000