Year % 1994 50.94762 2000 0 2001 0 2002 0 2003 0 2004 0 2005 38.34434 2006 37.45154 2007 37.44508 2008 37.75233 2009 38.21592 2010 38.55176 2011 37.7091 2012 37.71057 2013 36.54613 2014 37.12685 2015 36.16945 2016 36.33333 2018 38.51155 2019 38.17816 2020 39.33792 2021 39.95187