| 序号 | 时间 (年) |
数据 (千公顷) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | |
| 8 | 2013 | |
| 9 | 2012 | |
| 10 | 2011 | |
| 11 | 2010 | 0.03 |
| 12 | 2009 | 0.02 |
| 13 | 2008 | 0.03 |
| 14 | 2007 | 0.09 |
| 15 | 2006 | 0.27 |
| 16 | 2005 | 0.01 |
| 17 | 2001 | 0.07 |
| 18 | 2000 | 0.09 |
| 19 | 1999 | 3.40 |
| 20 | 1998 | 9.00 |
| 21 | 1997 | 19.40 |
| 22 | 1996 | 13.00 |
| 23 | 1995 | 14.50 |
| 24 | 1994 | 16.00 |
| 25 | 1993 | 14.00 |
| 26 | 1992 | 12.50 |
| 27 | 1991 | 18.00 |
| 28 | 1990 | 13.80 |
| 29 | 1989 | 13.90 |
| 30 | 1988 | 12.10 |
| 31 | 1987 | 9.10 |
| 32 | 1986 | 10.20 |
| 33 | 1985 | 11.90 |
| 34 | 1984 | 8.30 |
| 35 | 1983 | 4.90 |
| 36 | 1982 | 6.90 |
| 37 | 1981 | 3.00 |
| 38 | 1980 | 2.80 |
| 39 | 1979 | 1.60 |
| 40 | 1978 | 2.40 |
