Year % 1993 95.42303 1997 50 2001 54.5737 2002 53.46924 2003 42.63595 2004 52.83019 2005 45.34056 2006 54.40986 2007 51.8628 2008 40.15376 2009 41.93017 2010 29.95241 2011 35.07055 2012 37.49726 2013 48.01061 2015 37.84074 2016 42.30769 2018 43.02764 2020 42.00222 2021 40.92827