| 序号 | 时间 (年) |
数据 (千公顷) |
|---|---|---|
| 1 | 2018 | |
| 2 | 2017 | |
| 3 | 2016 | |
| 4 | 2015 | |
| 5 | 2014 | |
| 6 | 2007 | |
| 7 | 2006 | |
| 8 | 2005 | |
| 9 | 2004 | |
| 10 | 2003 | |
| 11 | 2002 | 5.79 |
| 12 | 2001 | 4.05 |
| 13 | 2000 | 4.05 |
| 14 | 1999 | 4.05 |
| 15 | 1998 | 4.05 |
| 16 | 1997 | 4.05 |
| 17 | 1996 | 4.04 |
| 18 | 1995 | 4.13 |
| 19 | 1994 | 4.13 |
| 20 | 1993 | 4.20 |
| 21 | 1992 | 0.10 |
| 22 | 1991 | 0.09 |
| 23 | 1990 | 0.09 |
| 24 | 1989 | 0.09 |
| 25 | 1988 | 0.10 |
| 26 | 1987 | 0.17 |
| 27 | 1986 | 0.15 |
| 28 | 1985 | 0.13 |
| 29 | 1984 | 0.15 |
| 30 | 1983 | 0.15 |
| 31 | 1982 | 0.17 |
| 32 | 1981 | 0.08 |
| 33 | 1980 | 0.09 |
| 34 | 1979 | 0.11 |
| 35 | 1978 | 0.14 |
