Year % 2001 45.03765 2006 43.27604 2007 38.03526 2008 35.01134 2009 38.17928 2010 37.98608 2011 41.00749 2014 37.27883 2015 37.27883 2018 42.09246 2019 42.09246 2020 54.85123 2021 44.955