Year NH3 NH₃ NOₓ NOx SO2 SO₂
2005 100 100 100
2006 99.1 97.6 97.1
2007 99.7 94.8 93.0
2008 97.3 88.5 70.4
2009 95.3 81.7 58.9
2010 94.4 79.8 51.7
2011 93.5 77.0 52.9
2012 93.3 73.8 45.0
2013 93.0 70.7 38.6
2014 93.5 68.0 35.7
2015 94.5 66.9 34.6
2016 95.0 64.9 29.4
2017 95.4 63.6 28.9
2018 94.3 61.2 26.7
2019 92.0 57.8 23.24
2020 91.3 51.5 20.4