Year % 1991 0 1992 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0.065369 2003 0 2004 0 2005 0.0114664 2006 0.0201167 2007 0 2008 0 2009 0.0426076 2010 0 2011 0 2012 0 2013 0 2014 0 2015 6.72508 2016 6.635165 2017 0 2018 0 2019 0 2020 0 2021 0