Spills - Operational - Volume in thousand tonnes (2008: 8.8; 2009: 1.4; 2010: 2.9; 2011: 6.0; 2012: 2.1; 2013: 0.9; 2014: 0.7; 2015: 0.8; 2016: 0.8; 2017: 0.3) and number of spills (line chart)