Year | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
SME | 22.39 | 22.22 | 21.97 | 21.93 | 21.37 | 21.24 | 21.14 | 21.97 | 22.12 | 22.65 | 23.01 |