| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 1.14 | 吨/公顷 | 2026-9 |
| 2025/2026 | 1.148 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.083 | 吨/公顷 | 2026-9 |
| 2023/2024 | 1.263 | 吨/公顷 | 2026-9 |
| 2022/2023 | 0.938 | 吨/公顷 | 2026-9 |
| 2021/2022 | 1.3 | 吨/公顷 | 2026-9 |
| 2020/2021 | 0.886 | 吨/公顷 | 2026-9 |
| 2019/2020 | 1.096 | 吨/公顷 | 2026-9 |
| 2018/2019 | 1.431 | 吨/公顷 | 2026-9 |
| 2017/2018 | 1.316 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.334 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.046 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.565 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.414 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.333 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.539 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.344 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.341 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.282 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.241 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.284 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.383 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.519 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.143 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.242 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.158 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.246 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.281 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.023 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.055 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.012 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.202 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.027 | 吨/公顷 | 2026-9 |
| 1993/1994 | 0.975 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.086 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.536 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.23 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.12 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.137 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.143 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.053 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.029 | 吨/公顷 | 2026-9 |
| 1984/1985 | 0.899 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.445 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.728 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.675 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.677 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.71 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.484 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.625 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.448 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.536 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.601 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.714 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.699 | 吨/公顷 | 2026-9 |
| 1971/1972 | 0.734 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.632 | 吨/公顷 | 2026-9 |
| 1969/1970 | 0.617 | 吨/公顷 | 2026-9 |