Year	Percent
1996-01-01	22.9302
1997-01-01	23.8427
1998-01-01	18.8216
1999-01-01	18.5814
2000-01-01	15.6232
2001-01-01	15.6932
2002-01-01	15.5854
2003-01-01	17.0390
2004-01-01	16.8267
2005-01-01	15.8454
2006-01-01	11.9606
2007-01-01	16.2714
2008-01-01	22.5188
2009-01-01	27.0399
2010-01-01	29.0821
2011-01-01	27.4172
2012-01-01	25.2023
2013-01-01	23.4009
2014-01-01	20.1028
2015-01-01	18.1899
2016-01-01	17.0001