United Nations Environmental Program and the World Conservation Monitoring Centre, as compiled by the World Resources Institute, based on data from national authorities, national legislation and international agreements.
| 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cambodia | 20.9 | 20.6 | 20.6 | 20.6 | 20.6 | 20.6 | 20.6 | 31.8 | 31.8 | 31.8 | 31.8 | 31.8 |
| Lao PDR | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 | 18.7 | 18.7 | 18.7 | 19.0 | 18.8 |
| Japan | 1.9 | 2.1 | 2.1 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 15.2 | 15.2 | 15.2 | 15.1 |
| China | 15.8 | 15.9 | 15.9 | 15.9 | 16.0 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 |
| Thailand | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 |
| Malaysia | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 9.0 | 9.0 | 7.5 | 8.8 | 8.8 | 8.8 | 8.4 |
| Brunei Darussalam | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 7.5 |
| Korea, Rep. | 2.3 | 2.6 | 2.6 | 3.9 | 3.9 | 4.0 | 5.5 | 5.8 | 5.9 | 5.9 | 5.9 | 5.8 |
| Indonesia | 6.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.2 |
| Myanmar | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.6 | 3.8 | 3.9 | 3.9 | 3.9 | 3.9 | 4.0 |
| Philippines | 2.4 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.7 | 3.7 | 3.7 | 3.6 |
| Vietnam | 2.6 | 2.6 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 |
| Singapore | 3.0 | 3.2 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.1 |