Terrestrial protected areas are those officially documented by national authorities.
| 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Luxembourg | 37.3 | 34.9 | 32.5 | 42.0 | 40.9 | 40.9 | 51.2 | 51.2 | 51.3 | 55.8 | 55.8 | 38.7 |
| Netherlands | 17.6 | 11.4 | 11.3 | 11.3 | 11.2 | 11.2 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.9 |
| Belgium | 22.9 | 22.8 | 22.8 | 23.3 | 23.3 | 23.3 | 24.9 | 15.4 | 15.5 | 15.6 | 15.6 | 16.3 |