Year	Percent
2001-01-01	30.500000000000000
2002-01-01	28.300000000000000
2003-01-01	26.500000000000000
2004-01-01	22.000000000000000
2005-01-01	18.800000000000000
2006-01-01	21.200000000000000
2007-01-01	20.400000000000000
2008-01-01	17.100000000000000
2009-01-01	18.300000000000000
2010-01-01	16.921700000000000
2011-01-01	16.597100000000000
2012-01-01	16.650000000000000
2013-01-01	16.752000000000000
2014-01-01	17.397000000000002
2015-01-01	13.958600000000000
2016-01-01	13.195100000000000