Year % 1991 0.018231 1993 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0.0119899 2005 0.0128561 2006 0.0527502 2007 0 2008 0.0114471 2009 0 2010 0 2011 0 2012 0.0232671 2013 0 2014 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0 2021 0