| 序号 | 时间 (年) |
数据 (平方公里) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | 38.65 |
| 8 | 2016 | 37.60 |
| 9 | 2015 | 36.40 |
| 10 | 2014 | 35.89 |
| 11 | 2013 | 35.00 |
| 12 | 2012 | 33.46 |
| 13 | 2011 | 32.84 |
| 14 | 2010 | 27.55 |
| 15 | 2009 | 26.96 |
