"Jahr" "Schlacke" "E-Filterstaub/Filterkuchen" 2006 24251.5 4109.2 2007 24785.6 4391.4 2008 25859 4569.8 2009 25674.5 4392.5 2010 25389.1 4481.4 2011 25186.9 4723.5 2012 25958.8 4983.5 2013 25005.7 4730 2014 26318.6 4856.8 2015 26181.1 4758.4 2016 28916.7 4263.5 2017 26999.7 4006.8 2018 27997.8 3694.7 2019 26091.1 3288.5 2020 26944 3439.8 2021 27324.1 2677.1