| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 4.211 | 吨/公顷 | 2026-9 |
| 2025/2026 | 4.286 | 吨/公顷 | 2026-9 |
| 2024/2025 | 4.143 | 吨/公顷 | 2026-9 |
| 2023/2024 | 2.878 | 吨/公顷 | 2026-9 |
| 2022/2023 | 3.95 | 吨/公顷 | 2026-9 |
| 2021/2022 | 4.091 | 吨/公顷 | 2026-9 |
| 2020/2021 | 3.855 | 吨/公顷 | 2026-9 |
| 2019/2020 | 3.932 | 吨/公顷 | 2026-9 |
| 2018/2019 | 2.959 | 吨/公顷 | 2026-9 |
| 2017/2018 | 3.712 | 吨/公顷 | 2026-9 |
| 2016/2017 | 3.612 | 吨/公顷 | 2026-9 |
| 2015/2016 | 3.383 | 吨/公顷 | 2026-9 |
| 2014/2015 | 3.146 | 吨/公顷 | 2026-9 |
| 2013/2014 | 3 | 吨/公顷 | 2026-9 |
| 2012/2013 | 3.361 | 吨/公顷 | 2026-9 |
| 2011/2012 | 3.138 | 吨/公顷 | 2026-9 |
| 2010/2011 | 2.671 | 吨/公顷 | 2026-9 |
| 2009/2010 | 2.691 | 吨/公顷 | 2026-9 |
| 2008/2009 | 2.64 | 吨/公顷 | 2026-9 |
| 2007/2008 | 2.635 | 吨/公顷 | 2026-9 |
| 2006/2007 | 2.194 | 吨/公顷 | 2026-9 |
| 2005/2006 | 2.372 | 吨/公顷 | 2026-9 |
| 2004/2005 | 2.323 | 吨/公顷 | 2026-9 |
| 2003/2004 | 2.214 | 吨/公顷 | 2026-9 |
| 2002/2003 | 2.059 | 吨/公顷 | 2026-9 |
| 2001/2002 | 2.011 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.922 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.654 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.773 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.938 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.591 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.925 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.667 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.667 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.686 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.684 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.653 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.651 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.753 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.667 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.373 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.342 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.774 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.467 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.191 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.298 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.319 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.703 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.626 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.344 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.415 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.389 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.281 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.211 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.166 | 吨/公顷 | 2026-9 |