Year	Percent
1997-01-01	0.698388000000000
1998-01-01	2.235530000000000
1999-01-01	21.523000000000003
2000-01-01	21.639100000000000
2001-01-01	20.340900000000000
2002-01-01	19.817100000000000
2003-01-01	17.647800000000000
2004-01-01	14.906100000000000
2005-01-01	11.956500000000000
2006-01-01	11.387600000000000
2007-01-01	10.475600000000000
2008-01-01	8.493590000000000
2009-01-01	10.451400000000000
2010-01-01	9.136770000000000
2011-01-01	8.752089999999999
2012-01-01	9.096969999999999
2013-01-01	8.713830000000000
2014-01-01	10.586100000000000
2015-01-01	12.185400000000000
2016-01-01	14.117100000000000