Year % 2005 0 2006 0 2010 0.5872787 2011 0.5872787 2012 0.5872787 2015 0.5336741 2016 0.6859701 2017 0.6080168 2018 0.6080168 2019 0.3942181 2020 0.3942181 2021 0.3942181