| 序号 | 时间 (年) |
数据 (千公顷) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 19.54 |
| 8 | 2014 | 27.54 |
| 9 | 2013 | 27.96 |
| 10 | 2012 | 27.45 |
| 11 | 2011 | 28.05 |
| 12 | 2010 | 29.38 |
| 13 | 2009 | 29.69 |
| 14 | 2008 | 29.57 |
| 15 | 2007 | 31.70 |
| 16 | 2006 | 29.47 |
| 17 | 2005 | 27.41 |
| 18 | 2004 | 28.02 |
| 19 | 2003 | 28.54 |
| 20 | 2002 | 29.69 |
| 21 | 2001 | 29.98 |
| 22 | 2000 | 30.28 |
| 23 | 1995 | 29.09 |
| 24 | 1990 | 33.49 |
| 25 | 1986 | 30.20 |
