Year % 1991 34.36237 1993 13.0078 1996 13.68223 1997 13.95827 1998 13.96899 1999 13.88976 2000 7.215155 2001 7.527913 2002 6.648465 2003 6.827109 2004 7.184965 2005 6.88199 2006 6.154184 2007 6.150572 2008 6.249089 2009 6.232872 2010 0.1695643 2011 0 2012 0 2013 0 2014 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0 2021 0