Year	Percent
2000-01-01	37.90
2001-01-01	37.90
2002-01-01	11.00
2003-01-01	7.40
2004-01-01	16.50
2005-01-01	26.80
2006-01-01	26.90
2007-01-01	25.60
2008-01-01	17.90
2009-01-01	10.60
2010-01-01	15.61
2011-01-01	15.08
2012-01-01	14.74
2013-01-01	22.42
2014-01-01	33.44
2015-01-01	31.73