| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 1.455 | 吨/公顷 | 2026-9 |
| 2025/2026 | 1.448 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.397 | 吨/公顷 | 2026-9 |
| 2023/2024 | 1.3 | 吨/公顷 | 2026-9 |
| 2022/2023 | 1.297 | 吨/公顷 | 2026-9 |
| 2021/2022 | 1.255 | 吨/公顷 | 2026-9 |
| 2020/2021 | 1.291 | 吨/公顷 | 2026-9 |
| 2019/2020 | 1.235 | 吨/公顷 | 2026-9 |
| 2018/2019 | 1.256 | 吨/公顷 | 2026-9 |
| 2017/2018 | 1.313 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.33 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.201 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.346 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.406 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.387 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.367 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.317 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.335 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.393 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.412 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.35 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.278 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.313 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.145 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.131 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.118 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.074 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.052 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.019 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.052 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.033 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.016 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.038 | 吨/公顷 | 2026-9 |
| 1993/1994 | 0.971 | 吨/公顷 | 2026-9 |
| 1992/1993 | 0.976 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.065 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.018 | 吨/公顷 | 2026-9 |
| 1989/1990 | 0.981 | 吨/公顷 | 2026-9 |
| 1988/1989 | 0.968 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.023 | 吨/公顷 | 2026-9 |
| 1986/1987 | 0.935 | 吨/公顷 | 2026-9 |
| 1985/1986 | 0.966 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.018 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.822 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.856 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.844 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.764 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.76 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.692 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.721 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.701 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.707 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.733 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.741 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.706 | 吨/公顷 | 2026-9 |
| 1971/1972 | 0.689 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.65 | 吨/公顷 | 2026-9 |
| 1969/1970 | 0.653 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0 | 吨/公顷 | 2026-9 |
| 1967/1968 | 0 | 吨/公顷 | 2026-9 |
| 1966/1967 | 0 | 吨/公顷 | 2026-9 |