Year	Percent
2001-01-01	12.6763
2002-01-01	12.8183
2003-01-01	17.5913
2004-01-01	23.3529
2005-01-01	20.5734
2006-01-01	27.3952
2007-01-01	34.0994
2008-01-01	11.6113
2009-01-01	19.9706
2010-01-01	25.8420
2011-01-01	22.3399
2012-01-01	25.7687
2013-01-01	26.6627
2014-01-01	23.4891
2015-01-01	20.0276
2016-01-01	18.8705