| 序号 | 时间 (年) |
数据 (平方公里) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 103.26 |
| 8 | 2014 | 100.91 |
| 9 | 2013 | 96.85 |
| 10 | 2012 | 90.76 |
| 11 | 2011 | 83.13 |
| 12 | 2010 | 74.11 |
| 13 | 2009 | 69.61 |
| 14 | 2008 | 51.07 |
| 15 | 2007 | 46.75 |
| 16 | 2006 | 44.19 |
| 17 | 2005 | 37.04 |
| 18 | 2004 | 33.84 |
| 19 | 2003 | 39.47 |
| 20 | 2001 | 26.00 |
| 21 | 2000 | 23.57 |
