Year	Percent
1999-01-01	4.5660400000000000
2000-01-01	3.7313500000000000
2001-01-01	3.1756700000000000
2002-01-01	3.2724000000000000
2003-01-01	3.1685400000000000
2004-01-01	4.3988400000000000
2005-01-01	2.9431200000000000
2006-01-01	2.9575099999999996
2007-01-01	3.6551800000000000
2008-01-01	2.7603299999999997
2009-01-01	2.0857700000000000
2010-01-01	1.3144100000000000
2011-01-01	1.6130900000000000
2012-01-01	1.7623600000000000
2013-01-01	1.6328100000000000
2014-01-01	2.0894700000000000
2015-01-01	1.2768899999999999
2016-01-01	1.6780900000000000