"Jahr" "Waldreservate" 1997 0.61 1998 0.61 1999 0.61 2000 0.61 2001 0.61 2002 0.61 2003 0.61 2004 0.61 2005 0.61 2006 0.61 2007 0.61 2008 0.61 2009 0.61 2010 0.61 2011 0.61 2012 0.61 2013 0.61 2014 0.61 2015 0.61 2016 0.61 2017 0.61 2018 0.61 2019 0.61 2020 0.61