Spills – operational: Volume in thousand tonnes (2010: 2.9; 2011: 6.0; 2012: 1.9; 2013: 0.9; 2014: 0.7; 2015: 0.8; 2016: 0.8; 2017: 0.4; 2018: 0.9; 2019: 0.2); Number of spills (2010: 195; 2011: 211; 2012: 207; 2013: 174; 2014: 158; 2015: 108; 2016: 72; 2017: 104; 2018: 93; 2019: 70) (line chart)