Year	Percent
2001-01-01	3.352910000000000
2002-01-01	2.433700000000000
2003-01-01	4.153350000000000
2004-01-01	4.698420000000000
2005-01-01	7.081490000000000
2006-01-01	12.464000000000000
2007-01-01	16.565300000000000
2008-01-01	6.477930000000001
2009-01-01	9.559740000000000
2010-01-01	12.745500000000000
2011-01-01	11.542400000000000
2012-01-01	15.566600000000000
2013-01-01	15.141200000000000
2014-01-01	18.000000000000000
2015-01-01	15.171300000000000
2016-01-01	15.532800000000000