Year	Percent
1999-01-01	6.823460000000001
2000-01-01	5.794390000000000
2001-01-01	7.360519999999999
2002-01-01	6.577660000000001
2003-01-01	9.397850000000000
2004-01-01	15.338900000000000
2005-01-01	19.053400000000000
2006-01-01	29.198200000000000
2007-01-01	33.175100000000000
2008-01-01	8.822360000000000
2009-01-01	19.814500000000000
2010-01-01	20.400000000000000
2011-01-01	15.172100000000000
2012-01-01	17.794500000000000
2013-01-01	19.435700000000000
2014-01-01	17.239400000000000
2015-01-01	19.856400000000000
2016-01-01	23.589600000000000