Year	Percent
1999-01-01	17.038800000000000
2000-01-01	25.441300000000000
2001-01-01	20.950700000000000
2002-01-01	19.926600000000000
2003-01-01	21.502700000000000
2004-01-01	22.908100000000000
2005-01-01	23.395800000000000
2006-01-01	28.864500000000000
2007-01-01	27.523100000000000
2008-01-01	13.835100000000000
2009-01-01	19.284700000000000
2010-01-01	23.000200000000000
2011-01-01	19.791500000000000
2012-01-01	26.104700000000000
2013-01-01	32.696600000000000
2014-01-01	34.586800000000000
2015-01-01	42.077600000000000
2016-01-01	43.611999999999995