| Efficiency | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | Mean value | |
| Comprehensive technical efficiency | Configuration phase | 0.842 | 0.820 | 0.805 | 0.760 | 0.828 | 0.779 | 0.809 | 0.802 | 0.786 | 0.779 | 0.801 |
| DEA effective | 5 | 3 | 3 | 3 | 3 | 4 | 6 | 3 | 3 | 2 | 3.5 | |
| Pure technical efficiency | Configuration phase | 0.901 | 0.884 | 0.873 | 0.867 | 0.926 | 0.911 | 0.917 | 0.939 | 0.941 | 0.939 | 0.910 |
| DEA effective | 5 | 3 | 5 | 5 | 6 | 7 | 7 | 9 | 10 | 8 | 6.5 | |
| Scale efficiency | Configuration phase | 0.933 | 0.927 | 0.921 | 0.876 | 0.889 | 0.852 | 0.880 | 0.855 | 0.836 | 0.830 | 0.880 |
| DEA effective | 7 | 6 | 4 | 5 | 3 | 5 | 9 | 6 | 4 | 2 | 5.1 | |