Year	Percent
1999-01-01	0.15610200000000000
2000-01-01	0.13167500000000000
2001-01-01	0.09737600000000000
2002-01-01	0.14851800000000000
2003-01-01	0.12627300000000000
2004-01-01	0.10950700000000000
2005-01-01	0.08573400000000000
2006-01-01	0.07047400000000000
2007-01-01	0.07193300000000001
2008-01-01	0.07193300000000001
2009-01-01	20.34650000000000000
2010-01-01	20.73630000000000000
2011-01-01	16.66850000000000000
2012-01-01	18.14670000000000000
2013-01-01	14.74800000000000000
2014-01-01	20.50240000000000000
2015-01-01	19.54460000000000000