Year % 2001 0.0394945 2002 0 2003 0 2005 0 2006 0 2007 0 2008 0 2009 0.0793441 2010 0.0527983 2011 0 2012 0 2014 0.0829016 2016 0.0791766 2018 0 2020 0 2021 0