Year % 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 3.238138 2003 0 2004 0 2005 0 2006 0 2007 0 2008 0 2009 18.46211 2010 13.81737 2011 19.47579 2012 12.11039 2013 18.2865 2014 19.23506 2015 18.7183 2016 18.55826 2017 28.92274 2018 14.99242 2019 14.99242 2020 14.3965 2021 14.65266