Year	Percent
1997-01-01	11.977400000000000
1998-01-01	23.569800000000000
1999-01-01	7.382610000000001
2000-01-01	25.178100000000000
2001-01-01	34.092500000000000
2002-01-01	22.811000000000000
2003-01-01	15.738400000000000
2004-01-01	16.819100000000000
2005-01-01	13.802300000000000
2006-01-01	10.720400000000000
2007-01-01	17.337300000000000
2008-01-01	15.651200000000000
2009-01-01	15.651200000000000
2010-01-01	13.773700000000000
2011-01-01	1.633850000000000
2012-01-01	21.618000000000002
2013-01-01	14.554100000000000
2014-01-01	14.884200000000000
2015-01-01	10.136700000000000
2016-01-01	10.698000000000000