| 序号 | 时间 (年) |
数据 (千公顷) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | 6.01 |
| 8 | 2008 | 6.11 |
| 9 | 2007 | 6.11 |
| 10 | 2006 | 6.11 |
| 11 | 2005 | 6.11 |
| 12 | 2004 | 6.14 |
| 13 | 2003 | 6.01 |
| 14 | 2002 | 6.10 |
| 15 | 2001 | 4.40 |
| 16 | 2000 | 4.40 |
| 17 | 1999 | 4.49 |
| 18 | 1998 | 4.45 |
| 19 | 1997 | 4.47 |
| 20 | 1996 | 4.47 |
| 21 | 1995 | 4.54 |
| 22 | 1994 | 4.55 |
| 23 | 1993 | 4.60 |
| 24 | 1992 | 10.78 |
| 25 | 1991 | 10.89 |
| 26 | 1990 | 10.89 |
| 27 | 1989 | 11.04 |
| 28 | 1988 | 11.13 |
| 29 | 1987 | 11.22 |
| 30 | 1986 | 11.38 |
| 31 | 1985 | 11.61 |
| 32 | 1984 | 11.71 |
| 33 | 1983 | 9.29 |
| 34 | 1982 | 9.38 |
| 35 | 1981 | 10.66 |
| 36 | 1980 | 10.81 |
