| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 4.344 | 吨/公顷 | 2026-9 |
| 2025/2026 | 4.224 | 吨/公顷 | 2026-9 |
| 2024/2025 | 4.175 | 吨/公顷 | 2026-9 |
| 2023/2024 | 4.232 | 吨/公顷 | 2026-9 |
| 2022/2023 | 4.497 | 吨/公顷 | 2026-9 |
| 2021/2022 | 4.638 | 吨/公顷 | 2026-9 |
| 2020/2021 | 4.287 | 吨/公顷 | 2026-9 |
| 2019/2020 | 4.419 | 吨/公顷 | 2026-9 |
| 2018/2019 | 4.496 | 吨/公顷 | 2026-9 |
| 2017/2018 | 4.49 | 吨/公顷 | 2026-9 |
| 2016/2017 | 4.071 | 吨/公顷 | 2026-9 |
| 2015/2016 | 4.307 | 吨/公顷 | 2026-9 |
| 2014/2015 | 4.4 | 吨/公顷 | 2026-9 |
| 2013/2014 | 4.486 | 吨/公顷 | 2026-9 |
| 2012/2013 | 4.721 | 吨/公顷 | 2026-9 |
| 2011/2012 | 3.799 | 吨/公顷 | 2026-9 |
| 2010/2011 | 3.713 | 吨/公顷 | 2026-9 |
| 2009/2010 | 3.833 | 吨/公顷 | 2026-9 |
| 2008/2009 | 3.839 | 吨/公顷 | 2026-9 |
| 2007/2008 | 3.442 | 吨/公顷 | 2026-9 |
| 2006/2007 | 3.206 | 吨/公顷 | 2026-9 |
| 2005/2006 | 3.352 | 吨/公顷 | 2026-9 |
| 2004/2005 | 3.449 | 吨/公顷 | 2026-9 |
| 2003/2004 | 3.541 | 吨/公顷 | 2026-9 |
| 2002/2003 | 2.88 | 吨/公顷 | 2026-9 |
| 2001/2002 | 3.398 | 吨/公顷 | 2026-9 |
| 2000/2001 | 2.738 | 吨/公顷 | 2026-9 |
| 1999/2000 | 2.99 | 吨/公顷 | 2026-9 |
| 1998/1999 | 3.027 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.806 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.977 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.557 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.942 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.25 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.879 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.739 | 吨/公顷 | 2026-9 |
| 1990/1991 | 2.232 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.718 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.741 | 吨/公顷 | 2026-9 |
| 1987/1988 | 2.62 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.701 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.148 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.235 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.689 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.017 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.846 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.927 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.935 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.744 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.753 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.865 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.792 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.605 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.471 | 吨/公顷 | 2026-9 |