| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 2.679 | 吨/公顷 | 2026-9 |
| 2025/2026 | 2.676 | 吨/公顷 | 2026-9 |
| 2024/2025 | 2.694 | 吨/公顷 | 2026-9 |
| 2023/2024 | 2.658 | 吨/公顷 | 2026-9 |
| 2022/2023 | 2.628 | 吨/公顷 | 2026-9 |
| 2021/2022 | 2.579 | 吨/公顷 | 2026-9 |
| 2020/2021 | 2.503 | 吨/公顷 | 2026-9 |
| 2019/2020 | 2.5 | 吨/公顷 | 2026-9 |
| 2018/2019 | 2.48 | 吨/公顷 | 2026-9 |
| 2017/2018 | 2.368 | 吨/公顷 | 2026-9 |
| 2016/2017 | 2.369 | 吨/公顷 | 2026-9 |
| 2015/2016 | 2.309 | 吨/公顷 | 2026-9 |
| 2014/2015 | 2.26 | 吨/公顷 | 2026-9 |
| 2013/2014 | 2.177 | 吨/公顷 | 2026-9 |
| 2012/2013 | 2.137 | 吨/公顷 | 2026-9 |
| 2011/2012 | 2.131 | 吨/公顷 | 2026-9 |
| 2010/2011 | 2.1 | 吨/公顷 | 2026-9 |
| 2009/2010 | 2.108 | 吨/公顷 | 2026-9 |
| 2008/2009 | 2.086 | 吨/公顷 | 2026-9 |
| 2007/2008 | 2.008 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.875 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.811 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.777 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.671 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.619 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.482 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.449 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.282 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.43 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.406 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.361 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.285 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.186 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.194 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.046 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.114 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.06 | 吨/公顷 | 2026-9 |
| 1989/1990 | 0.986 | 吨/公顷 | 2026-9 |
| 1988/1989 | 0.955 | 吨/公顷 | 2026-9 |
| 1987/1988 | 0.975 | 吨/公顷 | 2026-9 |
| 1986/1987 | 0.938 | 吨/公顷 | 2026-9 |
| 1985/1986 | 0.948 | 吨/公顷 | 2026-9 |
| 1984/1985 | 0.917 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.953 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.894 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.892 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.924 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.907 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.901 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.92 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.958 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.011 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.932 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.026 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.026 | 吨/公顷 | 2026-9 |